Home / 138,574.12-191,232.42-74,911.92

Finding the Fourth Proportional to 138,574.12, 191,232.42 and 74,911.92

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Solution

The fourth proportional to 138,574.12, 191,232.42 and 74,911.92 is: 103,378.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,574.12 : 191,232.42 = 74,911.92 : x
  2. Step 2: Convert to fraction form
    138,574.12/191,232.42 = 74,911.92/x
  3. Step 3: Cross multiply
    138,574.12x = 191,232.42 × 74,911.92
  4. Step 4: Simplify right side
    138,574.12x = 14,325,587,748.45
  5. Step 5: Solve for x
    x = 14,325,587,748.45/138,574.12
  6. Step 6: Final answer
    x = 103,378.52

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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.