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Finding the Fourth Proportional to 86,153.94, 129,230.92 and 39,374

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Solution

The fourth proportional to 86,153.94, 129,230.92 and 39,374 is: 59,061.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,153.94 : 129,230.92 = 39,374 : x
  2. Step 2: Convert to fraction form
    86,153.94/129,230.92 = 39,374/x
  3. Step 3: Cross multiply
    86,153.94x = 129,230.92 × 39,374
  4. Step 4: Simplify right side
    86,153.94x = 5,088,338,244.08
  5. Step 5: Solve for x
    x = 5,088,338,244.08/86,153.94
  6. Step 6: Final answer
    x = 59,061.00

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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.