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Finding the Fourth Proportional to 72,439.40, 108,659.10 and 62,719.40

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Solution

The fourth proportional to 72,439.40, 108,659.10 and 62,719.40 is: 94,079.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,439.40 : 108,659.10 = 62,719.40 : x
  2. Step 2: Convert to fraction form
    72,439.40/108,659.10 = 62,719.40/x
  3. Step 3: Cross multiply
    72,439.40x = 108,659.10 × 62,719.40
  4. Step 4: Simplify right side
    72,439.40x = 6,815,033,556.54
  5. Step 5: Solve for x
    x = 6,815,033,556.54/72,439.40
  6. Step 6: Final answer
    x = 94,079.10

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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.