Home / 100,042.02-138,108.11-77,329.62

Finding the Fourth Proportional to 100,042.02, 138,108.11 and 77,329.62

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Solution

The fourth proportional to 100,042.02, 138,108.11 and 77,329.62 is: 106,753.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,042.02 : 138,108.11 = 77,329.62 : x
  2. Step 2: Convert to fraction form
    100,042.02/138,108.11 = 77,329.62/x
  3. Step 3: Cross multiply
    100,042.02x = 138,108.11 × 77,329.62
  4. Step 4: Simplify right side
    100,042.02x = 10,679,847,278.57
  5. Step 5: Solve for x
    x = 10,679,847,278.57/100,042.02
  6. Step 6: Final answer
    x = 106,753.61

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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.