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Finding the Fourth Proportional to 86,248.79, 129,329.42 and 39,461.57

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Solution

The fourth proportional to 86,248.79, 129,329.42 and 39,461.57 is: 59,172.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,248.79 : 129,329.42 = 39,461.57 : x
  2. Step 2: Convert to fraction form
    86,248.79/129,329.42 = 39,461.57/x
  3. Step 3: Cross multiply
    86,248.79x = 129,329.42 × 39,461.57
  4. Step 4: Simplify right side
    86,248.79x = 5,103,541,313.74
  5. Step 5: Solve for x
    x = 5,103,541,313.74/86,248.79
  6. Step 6: Final answer
    x = 59,172.33

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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.