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Finding the Fourth Proportional to 138,918.20, 191,707.20 and 75,256.24

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Solution

The fourth proportional to 138,918.20, 191,707.20 and 75,256.24 is: 103,853.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,918.20 : 191,707.20 = 75,256.24 : x
  2. Step 2: Convert to fraction form
    138,918.20/191,707.20 = 75,256.24/x
  3. Step 3: Cross multiply
    138,918.20x = 191,707.20 × 75,256.24
  4. Step 4: Simplify right side
    138,918.20x = 14,427,163,052.93
  5. Step 5: Solve for x
    x = 14,427,163,052.93/138,918.20
  6. Step 6: Final answer
    x = 103,853.66

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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.