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Finding the Fourth Proportional to 86,348.97, 129,541.14 and 36,429.21

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Solution

The fourth proportional to 86,348.97, 129,541.14 and 36,429.21 is: 54,651.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,348.97 : 129,541.14 = 36,429.21 : x
  2. Step 2: Convert to fraction form
    86,348.97/129,541.14 = 36,429.21/x
  3. Step 3: Cross multiply
    86,348.97x = 129,541.14 × 36,429.21
  4. Step 4: Simplify right side
    86,348.97x = 4,719,081,392.70
  5. Step 5: Solve for x
    x = 4,719,081,392.70/86,348.97
  6. Step 6: Final answer
    x = 54,651.28

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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.