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Finding the Fourth Proportional to 138,714.52, 191,427.60 and 75,053.56

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Solution

The fourth proportional to 138,714.52, 191,427.60 and 75,053.56 is: 103,574.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,714.52 : 191,427.60 = 75,053.56 : x
  2. Step 2: Convert to fraction form
    138,714.52/191,427.60 = 75,053.56/x
  3. Step 3: Cross multiply
    138,714.52x = 191,427.60 × 75,053.56
  4. Step 4: Simplify right side
    138,714.52x = 14,367,322,862.26
  5. Step 5: Solve for x
    x = 14,367,322,862.26/138,714.52
  6. Step 6: Final answer
    x = 103,574.76

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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.