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Finding the Fourth Proportional to 91,679.92, 137,501.34 and 53,706.40

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Solution

The fourth proportional to 91,679.92, 137,501.34 and 53,706.40 is: 80,548.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,679.92 : 137,501.34 = 53,706.40 : x
  2. Step 2: Convert to fraction form
    91,679.92/137,501.34 = 53,706.40/x
  3. Step 3: Cross multiply
    91,679.92x = 137,501.34 × 53,706.40
  4. Step 4: Simplify right side
    91,679.92x = 7,384,701,966.58
  5. Step 5: Solve for x
    x = 7,384,701,966.58/91,679.92
  6. Step 6: Final answer
    x = 80,548.74

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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.