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Finding the Fourth Proportional to 138,697.52, 191,402.19 and 75,035.16

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Solution

The fourth proportional to 138,697.52, 191,402.19 and 75,035.16 is: 103,548.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,697.52 : 191,402.19 = 75,035.16 : x
  2. Step 2: Convert to fraction form
    138,697.52/191,402.19 = 75,035.16/x
  3. Step 3: Cross multiply
    138,697.52x = 191,402.19 × 75,035.16
  4. Step 4: Simplify right side
    138,697.52x = 14,361,893,951.00
  5. Step 5: Solve for x
    x = 14,361,893,951.00/138,697.52
  6. Step 6: Final answer
    x = 103,548.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.