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Finding the Fourth Proportional to 72,560.46, 100,139.52 and 42,347.76

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Solution

The fourth proportional to 72,560.46, 100,139.52 and 42,347.76 is: 58,443.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,560.46 : 100,139.52 = 42,347.76 : x
  2. Step 2: Convert to fraction form
    72,560.46/100,139.52 = 42,347.76/x
  3. Step 3: Cross multiply
    72,560.46x = 100,139.52 × 42,347.76
  4. Step 4: Simplify right side
    72,560.46x = 4,240,684,359.48
  5. Step 5: Solve for x
    x = 4,240,684,359.48/72,560.46
  6. Step 6: Final answer
    x = 58,443.46

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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.