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Finding the Fourth Proportional to 86,842.68, 130,059.86 and 42,329.92

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Solution

The fourth proportional to 86,842.68, 130,059.86 and 42,329.92 is: 63,395.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,842.68 : 130,059.86 = 42,329.92 : x
  2. Step 2: Convert to fraction form
    86,842.68/130,059.86 = 42,329.92/x
  3. Step 3: Cross multiply
    86,842.68x = 130,059.86 × 42,329.92
  4. Step 4: Simplify right side
    86,842.68x = 5,505,423,469.01
  5. Step 5: Solve for x
    x = 5,505,423,469.01/86,842.68
  6. Step 6: Final answer
    x = 63,395.37

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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.