Home / 138,826.94-191,580.35-78,417.14

Finding the Fourth Proportional to 138,826.94, 191,580.35 and 78,417.14

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Solution

The fourth proportional to 138,826.94, 191,580.35 and 78,417.14 is: 108,215.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,826.94 : 191,580.35 = 78,417.14 : x
  2. Step 2: Convert to fraction form
    138,826.94/191,580.35 = 78,417.14/x
  3. Step 3: Cross multiply
    138,826.94x = 191,580.35 × 78,417.14
  4. Step 4: Simplify right side
    138,826.94x = 15,023,181,777.21
  5. Step 5: Solve for x
    x = 15,023,181,777.21/138,826.94
  6. Step 6: Final answer
    x = 108,215.18

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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.