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Finding the Fourth Proportional to 71,841.30, 99,144.07 and 40,010.20

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Solution

The fourth proportional to 71,841.30, 99,144.07 and 40,010.20 is: 55,215.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,841.30 : 99,144.07 = 40,010.20 : x
  2. Step 2: Convert to fraction form
    71,841.30/99,144.07 = 40,010.20/x
  3. Step 3: Cross multiply
    71,841.30x = 99,144.07 × 40,010.20
  4. Step 4: Simplify right side
    71,841.30x = 3,966,774,069.51
  5. Step 5: Solve for x
    x = 3,966,774,069.51/71,841.30
  6. Step 6: Final answer
    x = 55,215.79

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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.