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Finding the Fourth Proportional to 71,295.12, 98,431.88 and 45,811.76

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Solution

The fourth proportional to 71,295.12, 98,431.88 and 45,811.76 is: 63,248.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,295.12 : 98,431.88 = 45,811.76 : x
  2. Step 2: Convert to fraction form
    71,295.12/98,431.88 = 45,811.76/x
  3. Step 3: Cross multiply
    71,295.12x = 98,431.88 × 45,811.76
  4. Step 4: Simplify right side
    71,295.12x = 4,509,337,662.91
  5. Step 5: Solve for x
    x = 4,509,337,662.91/71,295.12
  6. Step 6: Final answer
    x = 63,248.90

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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.