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Finding the Fourth Proportional to 91,616.80, 137,425.20 and 29,293.60

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Solution

The fourth proportional to 91,616.80, 137,425.20 and 29,293.60 is: 43,940.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,616.80 : 137,425.20 = 29,293.60 : x
  2. Step 2: Convert to fraction form
    91,616.80/137,425.20 = 29,293.60/x
  3. Step 3: Cross multiply
    91,616.80x = 137,425.20 × 29,293.60
  4. Step 4: Simplify right side
    91,616.80x = 4,025,678,838.72
  5. Step 5: Solve for x
    x = 4,025,678,838.72/91,616.80
  6. Step 6: Final answer
    x = 43,940.40

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1.5x scale

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.