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Finding the Fourth Proportional to 85,397.76, 117,815.04 and 57,058.56

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Solution

The fourth proportional to 85,397.76, 117,815.04 and 57,058.56 is: 78,718.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,397.76 : 117,815.04 = 57,058.56 : x
  2. Step 2: Convert to fraction form
    85,397.76/117,815.04 = 57,058.56/x
  3. Step 3: Cross multiply
    85,397.76x = 117,815.04 × 57,058.56
  4. Step 4: Simplify right side
    85,397.76x = 6,722,356,528.74
  5. Step 5: Solve for x
    x = 6,722,356,528.74/85,397.76
  6. Step 6: Final answer
    x = 78,718.18

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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.