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Finding the Fourth Proportional to 92,017.80, 138,026.70 and 81,520.20

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Solution

The fourth proportional to 92,017.80, 138,026.70 and 81,520.20 is: 122,280.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,017.80 : 138,026.70 = 81,520.20 : x
  2. Step 2: Convert to fraction form
    92,017.80/138,026.70 = 81,520.20/x
  3. Step 3: Cross multiply
    92,017.80x = 138,026.70 × 81,520.20
  4. Step 4: Simplify right side
    92,017.80x = 11,251,964,189.34
  5. Step 5: Solve for x
    x = 11,251,964,189.34/92,017.80
  6. Step 6: Final answer
    x = 122,280.30

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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.