Home / 138,645.92-191,331.38-74,983.70

Finding the Fourth Proportional to 138,645.92, 191,331.38 and 74,983.70

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Solution

The fourth proportional to 138,645.92, 191,331.38 and 74,983.70 is: 103,477.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,645.92 : 191,331.38 = 74,983.70 : x
  2. Step 2: Convert to fraction form
    138,645.92/191,331.38 = 74,983.70/x
  3. Step 3: Cross multiply
    138,645.92x = 191,331.38 × 74,983.70
  4. Step 4: Simplify right side
    138,645.92x = 14,346,734,798.51
  5. Step 5: Solve for x
    x = 14,346,734,798.51/138,645.92
  6. Step 6: Final answer
    x = 103,477.51

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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.