Home / 138,415.38-191,013.21-74,753.18

Finding the Fourth Proportional to 138,415.38, 191,013.21 and 74,753.18

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Solution

The fourth proportional to 138,415.38, 191,013.21 and 74,753.18 is: 103,159.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,415.38 : 191,013.21 = 74,753.18 : x
  2. Step 2: Convert to fraction form
    138,415.38/191,013.21 = 74,753.18/x
  3. Step 3: Cross multiply
    138,415.38x = 191,013.21 × 74,753.18
  4. Step 4: Simplify right side
    138,415.38x = 14,278,844,869.51
  5. Step 5: Solve for x
    x = 14,278,844,869.51/138,415.38
  6. Step 6: Final answer
    x = 103,159.38

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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.