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Finding the Fourth Proportional to 103,505.52, 155,258.28 and 82,631.28

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Solution

The fourth proportional to 103,505.52, 155,258.28 and 82,631.28 is: 123,946.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,505.52 : 155,258.28 = 82,631.28 : x
  2. Step 2: Convert to fraction form
    103,505.52/155,258.28 = 82,631.28/x
  3. Step 3: Cross multiply
    103,505.52x = 155,258.28 × 82,631.28
  4. Step 4: Simplify right side
    103,505.52x = 12,829,190,407.00
  5. Step 5: Solve for x
    x = 12,829,190,407.00/103,505.52
  6. Step 6: Final answer
    x = 123,946.92

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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.