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Finding the Fourth Proportional to 91,480.76, 137,079.40 and 63,455.28

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Solution

The fourth proportional to 91,480.76, 137,079.40 and 63,455.28 is: 95,084.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,480.76 : 137,079.40 = 63,455.28 : x
  2. Step 2: Convert to fraction form
    91,480.76/137,079.40 = 63,455.28/x
  3. Step 3: Cross multiply
    91,480.76x = 137,079.40 × 63,455.28
  4. Step 4: Simplify right side
    91,480.76x = 8,698,411,709.23
  5. Step 5: Solve for x
    x = 8,698,411,709.23/91,480.76
  6. Step 6: Final answer
    x = 95,084.60

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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.