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Finding the Fourth Proportional to 91,115.16, 125,718.60 and 52,881.12

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Solution

The fourth proportional to 91,115.16, 125,718.60 and 52,881.12 is: 72,964.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,115.16 : 125,718.60 = 52,881.12 : x
  2. Step 2: Convert to fraction form
    91,115.16/125,718.60 = 52,881.12/x
  3. Step 3: Cross multiply
    91,115.16x = 125,718.60 × 52,881.12
  4. Step 4: Simplify right side
    91,115.16x = 6,648,140,372.83
  5. Step 5: Solve for x
    x = 6,648,140,372.83/91,115.16
  6. Step 6: Final answer
    x = 72,964.15

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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.