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Finding the Fourth Proportional to 140,459.86, 193,787.12 and 79,987.64

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Solution

The fourth proportional to 140,459.86, 193,787.12 and 79,987.64 is: 110,355.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,459.86 : 193,787.12 = 79,987.64 : x
  2. Step 2: Convert to fraction form
    140,459.86/193,787.12 = 79,987.64/x
  3. Step 3: Cross multiply
    140,459.86x = 193,787.12 × 79,987.64
  4. Step 4: Simplify right side
    140,459.86x = 15,500,574,391.20
  5. Step 5: Solve for x
    x = 15,500,574,391.20/140,459.86
  6. Step 6: Final answer
    x = 110,355.90

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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.