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Finding the Fourth Proportional to 72,579.68, 100,143.24 and 42,353.12

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Solution

The fourth proportional to 72,579.68, 100,143.24 and 42,353.12 is: 58,437.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,579.68 : 100,143.24 = 42,353.12 : x
  2. Step 2: Convert to fraction form
    72,579.68/100,143.24 = 42,353.12/x
  3. Step 3: Cross multiply
    72,579.68x = 100,143.24 × 42,353.12
  4. Step 4: Simplify right side
    72,579.68x = 4,241,378,660.91
  5. Step 5: Solve for x
    x = 4,241,378,660.91/72,579.68
  6. Step 6: Final answer
    x = 58,437.55

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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.