Home / 138,516.12-191,152.98-81,189.24

Finding the Fourth Proportional to 138,516.12, 191,152.98 and 81,189.24

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Solution

The fourth proportional to 138,516.12, 191,152.98 and 81,189.24 is: 112,041.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,516.12 : 191,152.98 = 81,189.24 : x
  2. Step 2: Convert to fraction form
    138,516.12/191,152.98 = 81,189.24/x
  3. Step 3: Cross multiply
    138,516.12x = 191,152.98 × 81,189.24
  4. Step 4: Simplify right side
    138,516.12x = 15,519,565,169.94
  5. Step 5: Solve for x
    x = 15,519,565,169.94/138,516.12
  6. Step 6: Final answer
    x = 112,041.58

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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.