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Finding the Fourth Proportional to 81,230.16, 121,549.80 and 67,058.40

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Solution

The fourth proportional to 81,230.16, 121,549.80 and 67,058.40 is: 100,343.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,230.16 : 121,549.80 = 67,058.40 : x
  2. Step 2: Convert to fraction form
    81,230.16/121,549.80 = 67,058.40/x
  3. Step 3: Cross multiply
    81,230.16x = 121,549.80 × 67,058.40
  4. Step 4: Simplify right side
    81,230.16x = 8,150,935,108.32
  5. Step 5: Solve for x
    x = 8,150,935,108.32/81,230.16
  6. Step 6: Final answer
    x = 100,343.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.