Home / 138,612.40-191,277.18-78,179.44

Finding the Fourth Proportional to 138,612.40, 191,277.18 and 78,179.44

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Solution

The fourth proportional to 138,612.40, 191,277.18 and 78,179.44 is: 107,883.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,612.40 : 191,277.18 = 78,179.44 : x
  2. Step 2: Convert to fraction form
    138,612.40/191,277.18 = 78,179.44/x
  3. Step 3: Cross multiply
    138,612.40x = 191,277.18 × 78,179.44
  4. Step 4: Simplify right side
    138,612.40x = 14,953,943,296.43
  5. Step 5: Solve for x
    x = 14,953,943,296.43/138,612.40
  6. Step 6: Final answer
    x = 107,883.16

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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.