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Finding the Fourth Proportional to 111,290.70, 153,580.98 and 60,304.78

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Solution

The fourth proportional to 111,290.70, 153,580.98 and 60,304.78 is: 83,220.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,290.70 : 153,580.98 = 60,304.78 : x
  2. Step 2: Convert to fraction form
    111,290.70/153,580.98 = 60,304.78/x
  3. Step 3: Cross multiply
    111,290.70x = 153,580.98 × 60,304.78
  4. Step 4: Simplify right side
    111,290.70x = 9,261,667,211.08
  5. Step 5: Solve for x
    x = 9,261,667,211.08/111,290.70
  6. Step 6: Final answer
    x = 83,220.50

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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.