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Finding the Fourth Proportional to 92,001.80, 138,002.70 and 91,418.60

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Solution

The fourth proportional to 92,001.80, 138,002.70 and 91,418.60 is: 137,127.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,001.80 : 138,002.70 = 91,418.60 : x
  2. Step 2: Convert to fraction form
    92,001.80/138,002.70 = 91,418.60/x
  3. Step 3: Cross multiply
    92,001.80x = 138,002.70 × 91,418.60
  4. Step 4: Simplify right side
    92,001.80x = 12,616,013,630.22
  5. Step 5: Solve for x
    x = 12,616,013,630.22/92,001.80
  6. Step 6: Final answer
    x = 137,127.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.