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Finding the Fourth Proportional to 72,448.60, 108,672.90 and 66,746.20

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Solution

The fourth proportional to 72,448.60, 108,672.90 and 66,746.20 is: 100,119.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,448.60 : 108,672.90 = 66,746.20 : x
  2. Step 2: Convert to fraction form
    72,448.60/108,672.90 = 66,746.20/x
  3. Step 3: Cross multiply
    72,448.60x = 108,672.90 × 66,746.20
  4. Step 4: Simplify right side
    72,448.60x = 7,253,503,117.98
  5. Step 5: Solve for x
    x = 7,253,503,117.98/72,448.60
  6. Step 6: Final answer
    x = 100,119.30

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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.