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Finding the Fourth Proportional to 111,862.76, 154,370.64 and 61,561.76

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Solution

The fourth proportional to 111,862.76, 154,370.64 and 61,561.76 is: 84,955.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,862.76 : 154,370.64 = 61,561.76 : x
  2. Step 2: Convert to fraction form
    111,862.76/154,370.64 = 61,561.76/x
  3. Step 3: Cross multiply
    111,862.76x = 154,370.64 × 61,561.76
  4. Step 4: Simplify right side
    111,862.76x = 9,503,328,290.73
  5. Step 5: Solve for x
    x = 9,503,328,290.73/111,862.76
  6. Step 6: Final answer
    x = 84,955.25

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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.