Home / 138,463.50-191,079.89-80,331.51

Finding the Fourth Proportional to 138,463.50, 191,079.89 and 80,331.51

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Solution

The fourth proportional to 138,463.50, 191,079.89 and 80,331.51 is: 110,857.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,463.50 : 191,079.89 = 80,331.51 : x
  2. Step 2: Convert to fraction form
    138,463.50/191,079.89 = 80,331.51/x
  3. Step 3: Cross multiply
    138,463.50x = 191,079.89 × 80,331.51
  4. Step 4: Simplify right side
    138,463.50x = 15,349,736,094.33
  5. Step 5: Solve for x
    x = 15,349,736,094.33/138,463.50
  6. Step 6: Final answer
    x = 110,857.63

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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.