Home / 138,621.69-191,297.03-74,959.20

Finding the Fourth Proportional to 138,621.69, 191,297.03 and 74,959.20

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Solution

The fourth proportional to 138,621.69, 191,297.03 and 74,959.20 is: 103,443.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,621.69 : 191,297.03 = 74,959.20 : x
  2. Step 2: Convert to fraction form
    138,621.69/191,297.03 = 74,959.20/x
  3. Step 3: Cross multiply
    138,621.69x = 191,297.03 × 74,959.20
  4. Step 4: Simplify right side
    138,621.69x = 14,339,471,956.38
  5. Step 5: Solve for x
    x = 14,339,471,956.38/138,621.69
  6. Step 6: Final answer
    x = 103,443.21

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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.