Home / 138,130.20-207,195.30-49,386.60

Finding the Fourth Proportional to 138,130.20, 207,195.30 and 49,386.60

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Solution

The fourth proportional to 138,130.20, 207,195.30 and 49,386.60 is: 74,079.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,130.20 : 207,195.30 = 49,386.60 : x
  2. Step 2: Convert to fraction form
    138,130.20/207,195.30 = 49,386.60/x
  3. Step 3: Cross multiply
    138,130.20x = 207,195.30 × 49,386.60
  4. Step 4: Simplify right side
    138,130.20x = 10,232,671,402.98
  5. Step 5: Solve for x
    x = 10,232,671,402.98/138,130.20
  6. Step 6: Final answer
    x = 74,079.90

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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.