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Finding the Fourth Proportional to 158,931.66, 219,324.80 and 87,310.16

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Solution

The fourth proportional to 158,931.66, 219,324.80 and 87,310.16 is: 120,487.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,931.66 : 219,324.80 = 87,310.16 : x
  2. Step 2: Convert to fraction form
    158,931.66/219,324.80 = 87,310.16/x
  3. Step 3: Cross multiply
    158,931.66x = 219,324.80 × 87,310.16
  4. Step 4: Simplify right side
    158,931.66x = 19,149,283,379.97
  5. Step 5: Solve for x
    x = 19,149,283,379.97/158,931.66
  6. Step 6: Final answer
    x = 120,487.53

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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.