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Finding the Fourth Proportional to 71,643.38, 98,842.66 and 42,972.32

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Solution

The fourth proportional to 71,643.38, 98,842.66 and 42,972.32 is: 59,286.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,643.38 : 98,842.66 = 42,972.32 : x
  2. Step 2: Convert to fraction form
    71,643.38/98,842.66 = 42,972.32/x
  3. Step 3: Cross multiply
    71,643.38x = 98,842.66 × 42,972.32
  4. Step 4: Simplify right side
    71,643.38x = 4,247,498,554.85
  5. Step 5: Solve for x
    x = 4,247,498,554.85/71,643.38
  6. Step 6: Final answer
    x = 59,286.69

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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.