Home / 138,645.42-191,330.69-74,983.20

Finding the Fourth Proportional to 138,645.42, 191,330.69 and 74,983.20

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Solution

The fourth proportional to 138,645.42, 191,330.69 and 74,983.20 is: 103,476.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,645.42 : 191,330.69 = 74,983.20 : x
  2. Step 2: Convert to fraction form
    138,645.42/191,330.69 = 74,983.20/x
  3. Step 3: Cross multiply
    138,645.42x = 191,330.69 × 74,983.20
  4. Step 4: Simplify right side
    138,645.42x = 14,346,587,019.49
  5. Step 5: Solve for x
    x = 14,346,587,019.49/138,645.42
  6. Step 6: Final answer
    x = 103,476.82

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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.