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Finding the Fourth Proportional to 91,363.54, 137,060.08 and 28,168.88

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Solution

The fourth proportional to 91,363.54, 137,060.08 and 28,168.88 is: 42,257.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,363.54 : 137,060.08 = 28,168.88 : x
  2. Step 2: Convert to fraction form
    91,363.54/137,060.08 = 28,168.88/x
  3. Step 3: Cross multiply
    91,363.54x = 137,060.08 × 28,168.88
  4. Step 4: Simplify right side
    91,363.54x = 3,860,828,946.31
  5. Step 5: Solve for x
    x = 3,860,828,946.31/91,363.54
  6. Step 6: Final answer
    x = 42,257.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.