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Finding the Fourth Proportional to 86,961.80, 130,470.72 and 39,593.84

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Solution

The fourth proportional to 86,961.80, 130,470.72 and 39,593.84 is: 59,403.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,961.80 : 130,470.72 = 39,593.84 : x
  2. Step 2: Convert to fraction form
    86,961.80/130,470.72 = 39,593.84/x
  3. Step 3: Cross multiply
    86,961.80x = 130,470.72 × 39,593.84
  4. Step 4: Simplify right side
    86,961.80x = 5,165,836,812.36
  5. Step 5: Solve for x
    x = 5,165,836,812.36/86,961.80
  6. Step 6: Final answer
    x = 59,403.52

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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.