Home / 138,187.40-207,281.10-49,443.80

Finding the Fourth Proportional to 138,187.40, 207,281.10 and 49,443.80

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Solution

The fourth proportional to 138,187.40, 207,281.10 and 49,443.80 is: 74,165.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,187.40 : 207,281.10 = 49,443.80 : x
  2. Step 2: Convert to fraction form
    138,187.40/207,281.10 = 49,443.80/x
  3. Step 3: Cross multiply
    138,187.40x = 207,281.10 × 49,443.80
  4. Step 4: Simplify right side
    138,187.40x = 10,248,765,252.18
  5. Step 5: Solve for x
    x = 10,248,765,252.18/138,187.40
  6. Step 6: Final answer
    x = 74,165.70

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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.