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Finding the Fourth Proportional to 140,342.87, 193,670.88 and 76,679.30

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Solution

The fourth proportional to 140,342.87, 193,670.88 and 76,679.30 is: 105,816.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,342.87 : 193,670.88 = 76,679.30 : x
  2. Step 2: Convert to fraction form
    140,342.87/193,670.88 = 76,679.30/x
  3. Step 3: Cross multiply
    140,342.87x = 193,670.88 × 76,679.30
  4. Step 4: Simplify right side
    140,342.87x = 14,850,547,508.78
  5. Step 5: Solve for x
    x = 14,850,547,508.78/140,342.87
  6. Step 6: Final answer
    x = 105,816.19

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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.