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Finding the Fourth Proportional to 111,876.50, 154,392.90 and 61,575.50

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Solution

The fourth proportional to 111,876.50, 154,392.90 and 61,575.50 is: 84,976.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,876.50 : 154,392.90 = 61,575.50 : x
  2. Step 2: Convert to fraction form
    111,876.50/154,392.90 = 61,575.50/x
  3. Step 3: Cross multiply
    111,876.50x = 154,392.90 × 61,575.50
  4. Step 4: Simplify right side
    111,876.50x = 9,506,820,013.95
  5. Step 5: Solve for x
    x = 9,506,820,013.95/111,876.50
  6. Step 6: Final answer
    x = 84,976.02

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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.