Home / 100,072.62-138,052.50-61,818.41

Finding the Fourth Proportional to 100,072.62, 138,052.50 and 61,818.41

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Solution

The fourth proportional to 100,072.62, 138,052.50 and 61,818.41 is: 85,279.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,072.62 : 138,052.50 = 61,818.41 : x
  2. Step 2: Convert to fraction form
    100,072.62/138,052.50 = 61,818.41/x
  3. Step 3: Cross multiply
    100,072.62x = 138,052.50 × 61,818.41
  4. Step 4: Simplify right side
    100,072.62x = 8,534,185,356.26
  5. Step 5: Solve for x
    x = 8,534,185,356.26/100,072.62
  6. Step 6: Final answer
    x = 85,279.92

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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.