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Finding the Fourth Proportional to 121,868.10, 182,728.35 and 79,697.28

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Solution

The fourth proportional to 121,868.10, 182,728.35 and 79,697.28 is: 119,497.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,868.10 : 182,728.35 = 79,697.28 : x
  2. Step 2: Convert to fraction form
    121,868.10/182,728.35 = 79,697.28/x
  3. Step 3: Cross multiply
    121,868.10x = 182,728.35 × 79,697.28
  4. Step 4: Simplify right side
    121,868.10x = 14,562,952,473.89
  5. Step 5: Solve for x
    x = 14,562,952,473.89/121,868.10
  6. Step 6: Final answer
    x = 119,497.66

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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.