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Finding the Fourth Proportional to 207,978.44, 287,011.55 and 112,484.90

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Solution

The fourth proportional to 207,978.44, 287,011.55 and 112,484.90 is: 155,229.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,978.44 : 287,011.55 = 112,484.90 : x
  2. Step 2: Convert to fraction form
    207,978.44/287,011.55 = 112,484.90/x
  3. Step 3: Cross multiply
    207,978.44x = 287,011.55 × 112,484.90
  4. Step 4: Simplify right side
    207,978.44x = 32,284,466,499.34
  5. Step 5: Solve for x
    x = 32,284,466,499.34/207,978.44
  6. Step 6: Final answer
    x = 155,229.88

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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.