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Finding the Fourth Proportional to 158,331, 218,491.84 and 86,709.16

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Solution

The fourth proportional to 158,331, 218,491.84 and 86,709.16 is: 119,655.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,331 : 218,491.84 = 86,709.16 : x
  2. Step 2: Convert to fraction form
    158,331/218,491.84 = 86,709.16/x
  3. Step 3: Cross multiply
    158,331x = 218,491.84 × 86,709.16
  4. Step 4: Simplify right side
    158,331x = 18,945,243,913.25
  5. Step 5: Solve for x
    x = 18,945,243,913.25/158,331
  6. Step 6: Final answer
    x = 119,655.94

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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.