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Finding the Fourth Proportional to 112,218, 154,864.08 and 61,920.24

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Solution

The fourth proportional to 112,218, 154,864.08 and 61,920.24 is: 85,451.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,218 : 154,864.08 = 61,920.24 : x
  2. Step 2: Convert to fraction form
    112,218/154,864.08 = 61,920.24/x
  3. Step 3: Cross multiply
    112,218x = 154,864.08 × 61,920.24
  4. Step 4: Simplify right side
    112,218x = 9,589,221,000.98
  5. Step 5: Solve for x
    x = 9,589,221,000.98/112,218
  6. Step 6: Final answer
    x = 85,451.72

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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.