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Finding the Fourth Proportional to 72,405.90, 108,529.65 and 25,634.70

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Solution

The fourth proportional to 72,405.90, 108,529.65 and 25,634.70 is: 38,424.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,405.90 : 108,529.65 = 25,634.70 : x
  2. Step 2: Convert to fraction form
    72,405.90/108,529.65 = 25,634.70/x
  3. Step 3: Cross multiply
    72,405.90x = 108,529.65 × 25,634.70
  4. Step 4: Simplify right side
    72,405.90x = 2,782,125,018.86
  5. Step 5: Solve for x
    x = 2,782,125,018.86/72,405.90
  6. Step 6: Final answer
    x = 38,424.01

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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.