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Finding the Fourth Proportional to 100,365.69, 138,499.97 and 57,937.89

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Solution

The fourth proportional to 100,365.69, 138,499.97 and 57,937.89 is: 79,951.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,365.69 : 138,499.97 = 57,937.89 : x
  2. Step 2: Convert to fraction form
    100,365.69/138,499.97 = 57,937.89/x
  3. Step 3: Cross multiply
    100,365.69x = 138,499.97 × 57,937.89
  4. Step 4: Simplify right side
    100,365.69x = 8,024,395,737.17
  5. Step 5: Solve for x
    x = 8,024,395,737.17/100,365.69
  6. Step 6: Final answer
    x = 79,951.58

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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.