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Finding the Fourth Proportional to 71,888.92, 99,206.46 and 40,058.20

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Solution

The fourth proportional to 71,888.92, 99,206.46 and 40,058.20 is: 55,280.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,888.92 : 99,206.46 = 40,058.20 : x
  2. Step 2: Convert to fraction form
    71,888.92/99,206.46 = 40,058.20/x
  3. Step 3: Cross multiply
    71,888.92x = 99,206.46 × 40,058.20
  4. Step 4: Simplify right side
    71,888.92x = 3,974,032,215.97
  5. Step 5: Solve for x
    x = 3,974,032,215.97/71,888.92
  6. Step 6: Final answer
    x = 55,280.18

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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.