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Finding the Fourth Proportional to 71,315.20, 98,431.52 and 47,442.88

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Solution

The fourth proportional to 71,315.20, 98,431.52 and 47,442.88 is: 65,482.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,315.20 : 98,431.52 = 47,442.88 : x
  2. Step 2: Convert to fraction form
    71,315.20/98,431.52 = 47,442.88/x
  3. Step 3: Cross multiply
    71,315.20x = 98,431.52 × 47,442.88
  4. Step 4: Simplify right side
    71,315.20x = 4,669,874,791.58
  5. Step 5: Solve for x
    x = 4,669,874,791.58/71,315.20
  6. Step 6: Final answer
    x = 65,482.18

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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.