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Finding the Fourth Proportional to 158,079.92, 218,154.60 and 86,464.16

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Solution

The fourth proportional to 158,079.92, 218,154.60 and 86,464.16 is: 119,322.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,079.92 : 218,154.60 = 86,464.16 : x
  2. Step 2: Convert to fraction form
    158,079.92/218,154.60 = 86,464.16/x
  3. Step 3: Cross multiply
    158,079.92x = 218,154.60 × 86,464.16
  4. Step 4: Simplify right side
    158,079.92x = 18,862,554,239.14
  5. Step 5: Solve for x
    x = 18,862,554,239.14/158,079.92
  6. Step 6: Final answer
    x = 119,322.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.