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Finding the Fourth Proportional to 100,425.87, 138,592.71 and 57,407.58

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Solution

The fourth proportional to 100,425.87, 138,592.71 and 57,407.58 is: 79,225.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,425.87 : 138,592.71 = 57,407.58 : x
  2. Step 2: Convert to fraction form
    100,425.87/138,592.71 = 57,407.58/x
  3. Step 3: Cross multiply
    100,425.87x = 138,592.71 × 57,407.58
  4. Step 4: Simplify right side
    100,425.87x = 7,956,272,086.74
  5. Step 5: Solve for x
    x = 7,956,272,086.74/100,425.87
  6. Step 6: Final answer
    x = 79,225.32

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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.