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Finding the Fourth Proportional to 72,711.60, 100,340.28 and 47,560.56

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Solution

The fourth proportional to 72,711.60, 100,340.28 and 47,560.56 is: 65,632.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,711.60 : 100,340.28 = 47,560.56 : x
  2. Step 2: Convert to fraction form
    72,711.60/100,340.28 = 47,560.56/x
  3. Step 3: Cross multiply
    72,711.60x = 100,340.28 × 47,560.56
  4. Step 4: Simplify right side
    72,711.60x = 4,772,239,907.36
  5. Step 5: Solve for x
    x = 4,772,239,907.36/72,711.60
  6. Step 6: Final answer
    x = 65,632.44

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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.