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Finding the Fourth Proportional to 112,155.70, 154,770.59 and 61,854.70

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Solution

The fourth proportional to 112,155.70, 154,770.59 and 61,854.70 is: 85,357.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,155.70 : 154,770.59 = 61,854.70 : x
  2. Step 2: Convert to fraction form
    112,155.70/154,770.59 = 61,854.70/x
  3. Step 3: Cross multiply
    112,155.70x = 154,770.59 × 61,854.70
  4. Step 4: Simplify right side
    112,155.70x = 9,573,288,413.27
  5. Step 5: Solve for x
    x = 9,573,288,413.27/112,155.70
  6. Step 6: Final answer
    x = 85,357.13

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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.