Home / 138,542.05-191,184.19-78,112.16

Finding the Fourth Proportional to 138,542.05, 191,184.19 and 78,112.16

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Solution

The fourth proportional to 138,542.05, 191,184.19 and 78,112.16 is: 107,792.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,542.05 : 191,184.19 = 78,112.16 : x
  2. Step 2: Convert to fraction form
    138,542.05/191,184.19 = 78,112.16/x
  3. Step 3: Cross multiply
    138,542.05x = 191,184.19 × 78,112.16
  4. Step 4: Simplify right side
    138,542.05x = 14,933,810,038.75
  5. Step 5: Solve for x
    x = 14,933,810,038.75/138,542.05
  6. Step 6: Final answer
    x = 107,792.62

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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.