Home / 112,883.61-155,663.13-78,879.69

Finding the Fourth Proportional to 112,883.61, 155,663.13 and 78,879.69

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Solution

The fourth proportional to 112,883.61, 155,663.13 and 78,879.69 is: 108,772.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,883.61 : 155,663.13 = 78,879.69 : x
  2. Step 2: Convert to fraction form
    112,883.61/155,663.13 = 78,879.69/x
  3. Step 3: Cross multiply
    112,883.61x = 155,663.13 × 78,879.69
  4. Step 4: Simplify right side
    112,883.61x = 12,278,659,438.83
  5. Step 5: Solve for x
    x = 12,278,659,438.83/112,883.61
  6. Step 6: Final answer
    x = 108,772.74

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1.5x scale

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.