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Finding the Fourth Proportional to 86,595.40, 129,893.10 and 69,099.40

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Solution

The fourth proportional to 86,595.40, 129,893.10 and 69,099.40 is: 103,649.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,595.40 : 129,893.10 = 69,099.40 : x
  2. Step 2: Convert to fraction form
    86,595.40/129,893.10 = 69,099.40/x
  3. Step 3: Cross multiply
    86,595.40x = 129,893.10 × 69,099.40
  4. Step 4: Simplify right side
    86,595.40x = 8,975,535,274.14
  5. Step 5: Solve for x
    x = 8,975,535,274.14/86,595.40
  6. Step 6: Final answer
    x = 103,649.10

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.