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Finding the Fourth Proportional to 72,649.67, 100,251.95 and 42,443.55

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Solution

The fourth proportional to 72,649.67, 100,251.95 and 42,443.55 is: 58,569.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,649.67 : 100,251.95 = 42,443.55 : x
  2. Step 2: Convert to fraction form
    72,649.67/100,251.95 = 42,443.55/x
  3. Step 3: Cross multiply
    72,649.67x = 100,251.95 × 42,443.55
  4. Step 4: Simplify right side
    72,649.67x = 4,255,048,440.20
  5. Step 5: Solve for x
    x = 4,255,048,440.20/72,649.67
  6. Step 6: Final answer
    x = 58,569.42

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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.