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Finding the Fourth Proportional to 158,490.72, 218,722.14 and 86,877.54

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Solution

The fourth proportional to 158,490.72, 218,722.14 and 86,877.54 is: 119,893.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,490.72 : 218,722.14 = 86,877.54 : x
  2. Step 2: Convert to fraction form
    158,490.72/218,722.14 = 86,877.54/x
  3. Step 3: Cross multiply
    158,490.72x = 218,722.14 × 86,877.54
  4. Step 4: Simplify right side
    158,490.72x = 19,002,041,466.74
  5. Step 5: Solve for x
    x = 19,002,041,466.74/158,490.72
  6. Step 6: Final answer
    x = 119,893.72

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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.