Home / 138,598.07-191,271.83-78,167.44

Finding the Fourth Proportional to 138,598.07, 191,271.83 and 78,167.44

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Solution

The fourth proportional to 138,598.07, 191,271.83 and 78,167.44 is: 107,874.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,598.07 : 191,271.83 = 78,167.44 : x
  2. Step 2: Convert to fraction form
    138,598.07/191,271.83 = 78,167.44/x
  3. Step 3: Cross multiply
    138,598.07x = 191,271.83 × 78,167.44
  4. Step 4: Simplify right side
    138,598.07x = 14,951,229,295.22
  5. Step 5: Solve for x
    x = 14,951,229,295.22/138,598.07
  6. Step 6: Final answer
    x = 107,874.73

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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.