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Finding the Fourth Proportional to 158,634.48, 218,916.90 and 87,013.92

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Solution

The fourth proportional to 158,634.48, 218,916.90 and 87,013.92 is: 120,079.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,634.48 : 218,916.90 = 87,013.92 : x
  2. Step 2: Convert to fraction form
    158,634.48/218,916.90 = 87,013.92/x
  3. Step 3: Cross multiply
    158,634.48x = 218,916.90 × 87,013.92
  4. Step 4: Simplify right side
    158,634.48x = 19,048,817,623.25
  5. Step 5: Solve for x
    x = 19,048,817,623.25/158,634.48
  6. Step 6: Final answer
    x = 120,079.93

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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.