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Finding the Fourth Proportional to 138,885.20, 207,108.22 and 137,622.20

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Solution

The fourth proportional to 138,885.20, 207,108.22 and 137,622.20 is: 205,224.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,885.20 : 207,108.22 = 137,622.20 : x
  2. Step 2: Convert to fraction form
    138,885.20/207,108.22 = 137,622.20/x
  3. Step 3: Cross multiply
    138,885.20x = 207,108.22 × 137,622.20
  4. Step 4: Simplify right side
    138,885.20x = 28,502,688,874.48
  5. Step 5: Solve for x
    x = 28,502,688,874.48/138,885.20
  6. Step 6: Final answer
    x = 205,224.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.