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Finding the Fourth Proportional to 128,001.30, 192,001.95 and 72,705.30

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Solution

The fourth proportional to 128,001.30, 192,001.95 and 72,705.30 is: 109,057.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,001.30 : 192,001.95 = 72,705.30 : x
  2. Step 2: Convert to fraction form
    128,001.30/192,001.95 = 72,705.30/x
  3. Step 3: Cross multiply
    128,001.30x = 192,001.95 × 72,705.30
  4. Step 4: Simplify right side
    128,001.30x = 13,959,559,375.34
  5. Step 5: Solve for x
    x = 13,959,559,375.34/128,001.30
  6. Step 6: Final answer
    x = 109,057.95

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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.