Home / 138,165.95-207,336.14-79,116.95

Finding the Fourth Proportional to 138,165.95, 207,336.14 and 79,116.95

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Solution

The fourth proportional to 138,165.95, 207,336.14 and 79,116.95 is: 118,725.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,165.95 : 207,336.14 = 79,116.95 : x
  2. Step 2: Convert to fraction form
    138,165.95/207,336.14 = 79,116.95/x
  3. Step 3: Cross multiply
    138,165.95x = 207,336.14 × 79,116.95
  4. Step 4: Simplify right side
    138,165.95x = 16,403,803,021.57
  5. Step 5: Solve for x
    x = 16,403,803,021.57/138,165.95
  6. Step 6: Final answer
    x = 118,725.37

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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.