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Finding the Fourth Proportional to 100,615.59, 138,801.67 and 72,337.68

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Solution

The fourth proportional to 100,615.59, 138,801.67 and 72,337.68 is: 99,791.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,615.59 : 138,801.67 = 72,337.68 : x
  2. Step 2: Convert to fraction form
    100,615.59/138,801.67 = 72,337.68/x
  3. Step 3: Cross multiply
    100,615.59x = 138,801.67 × 72,337.68
  4. Step 4: Simplify right side
    100,615.59x = 10,040,590,607.08
  5. Step 5: Solve for x
    x = 10,040,590,607.08/100,615.59
  6. Step 6: Final answer
    x = 99,791.60

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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.