Home / 138,464.20-191,081.79-78,023.26

Finding the Fourth Proportional to 138,464.20, 191,081.79 and 78,023.26

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Solution

The fourth proportional to 138,464.20, 191,081.79 and 78,023.26 is: 107,672.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,464.20 : 191,081.79 = 78,023.26 : x
  2. Step 2: Convert to fraction form
    138,464.20/191,081.79 = 78,023.26/x
  3. Step 3: Cross multiply
    138,464.20x = 191,081.79 × 78,023.26
  4. Step 4: Simplify right side
    138,464.20x = 14,908,824,421.29
  5. Step 5: Solve for x
    x = 14,908,824,421.29/138,464.20
  6. Step 6: Final answer
    x = 107,672.77

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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.