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Finding the Fourth Proportional to 138,775.10, 208,114.05 and 72,193.10

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Solution

The fourth proportional to 138,775.10, 208,114.05 and 72,193.10 is: 108,264.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,775.10 : 208,114.05 = 72,193.10 : x
  2. Step 2: Convert to fraction form
    138,775.10/208,114.05 = 72,193.10/x
  3. Step 3: Cross multiply
    138,775.10x = 208,114.05 × 72,193.10
  4. Step 4: Simplify right side
    138,775.10x = 15,024,398,423.06
  5. Step 5: Solve for x
    x = 15,024,398,423.06/138,775.10
  6. Step 6: Final answer
    x = 108,264.37

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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.