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Finding the Fourth Proportional to 72,400.40, 108,521.40 and 25,629.20

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Solution

The fourth proportional to 72,400.40, 108,521.40 and 25,629.20 is: 38,415.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,400.40 : 108,521.40 = 25,629.20 : x
  2. Step 2: Convert to fraction form
    72,400.40/108,521.40 = 25,629.20/x
  3. Step 3: Cross multiply
    72,400.40x = 108,521.40 × 25,629.20
  4. Step 4: Simplify right side
    72,400.40x = 2,781,316,664.88
  5. Step 5: Solve for x
    x = 2,781,316,664.88/72,400.40
  6. Step 6: Final answer
    x = 38,415.76

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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.