Home / 138,924.80-191,733.60-78,498.40

Finding the Fourth Proportional to 138,924.80, 191,733.60 and 78,498.40

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Solution

The fourth proportional to 138,924.80, 191,733.60 and 78,498.40 is: 108,337.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,924.80 : 191,733.60 = 78,498.40 : x
  2. Step 2: Convert to fraction form
    138,924.80/191,733.60 = 78,498.40/x
  3. Step 3: Cross multiply
    138,924.80x = 191,733.60 × 78,498.40
  4. Step 4: Simplify right side
    138,924.80x = 15,050,780,826.24
  5. Step 5: Solve for x
    x = 15,050,780,826.24/138,924.80
  6. Step 6: Final answer
    x = 108,337.61

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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.