Home / 135,122.10-186,478.22-74,691.50

Finding the Fourth Proportional to 135,122.10, 186,478.22 and 74,691.50

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Solution

The fourth proportional to 135,122.10, 186,478.22 and 74,691.50 is: 103,079.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,122.10 : 186,478.22 = 74,691.50 : x
  2. Step 2: Convert to fraction form
    135,122.10/186,478.22 = 74,691.50/x
  3. Step 3: Cross multiply
    135,122.10x = 186,478.22 × 74,691.50
  4. Step 4: Simplify right side
    135,122.10x = 13,928,336,663.28
  5. Step 5: Solve for x
    x = 13,928,336,663.28/135,122.10
  6. Step 6: Final answer
    x = 103,079.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.