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Finding the Fourth Proportional to 86,500.70, 129,641.70 and 77,096.60

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Solution

The fourth proportional to 86,500.70, 129,641.70 and 77,096.60 is: 115,547.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,500.70 : 129,641.70 = 77,096.60 : x
  2. Step 2: Convert to fraction form
    86,500.70/129,641.70 = 77,096.60/x
  3. Step 3: Cross multiply
    86,500.70x = 129,641.70 × 77,096.60
  4. Step 4: Simplify right side
    86,500.70x = 9,994,934,288.22
  5. Step 5: Solve for x
    x = 9,994,934,288.22/86,500.70
  6. Step 6: Final answer
    x = 115,547.44

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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.