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Finding the Fourth Proportional to 145,287.99, 218,260.04 and 86,162.44

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Solution

The fourth proportional to 145,287.99, 218,260.04 and 86,162.44 is: 129,438.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,287.99 : 218,260.04 = 86,162.44 : x
  2. Step 2: Convert to fraction form
    145,287.99/218,260.04 = 86,162.44/x
  3. Step 3: Cross multiply
    145,287.99x = 218,260.04 × 86,162.44
  4. Step 4: Simplify right side
    145,287.99x = 18,805,817,600.90
  5. Step 5: Solve for x
    x = 18,805,817,600.90/145,287.99
  6. Step 6: Final answer
    x = 129,438.21

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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.