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Finding the Fourth Proportional to 72,919.44, 100,621.44 and 42,282

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Solution

The fourth proportional to 72,919.44, 100,621.44 and 42,282 is: 58,344.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,919.44 : 100,621.44 = 42,282 : x
  2. Step 2: Convert to fraction form
    72,919.44/100,621.44 = 42,282/x
  3. Step 3: Cross multiply
    72,919.44x = 100,621.44 × 42,282
  4. Step 4: Simplify right side
    72,919.44x = 4,254,475,726.08
  5. Step 5: Solve for x
    x = 4,254,475,726.08/72,919.44
  6. Step 6: Final answer
    x = 58,344.88

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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.