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Finding the Fourth Proportional to 86,600.40, 129,900.60 and 69,104.40

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Solution

The fourth proportional to 86,600.40, 129,900.60 and 69,104.40 is: 103,656.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,600.40 : 129,900.60 = 69,104.40 : x
  2. Step 2: Convert to fraction form
    86,600.40/129,900.60 = 69,104.40/x
  3. Step 3: Cross multiply
    86,600.40x = 129,900.60 × 69,104.40
  4. Step 4: Simplify right side
    86,600.40x = 8,976,703,022.64
  5. Step 5: Solve for x
    x = 8,976,703,022.64/86,600.40
  6. Step 6: Final answer
    x = 103,656.60

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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.