Home / 185,615.10-278,422.65-138,959.10

Finding the Fourth Proportional to 185,615.10, 278,422.65 and 138,959.10

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Solution

The fourth proportional to 185,615.10, 278,422.65 and 138,959.10 is: 208,438.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,615.10 : 278,422.65 = 138,959.10 : x
  2. Step 2: Convert to fraction form
    185,615.10/278,422.65 = 138,959.10/x
  3. Step 3: Cross multiply
    185,615.10x = 278,422.65 × 138,959.10
  4. Step 4: Simplify right side
    185,615.10x = 38,689,360,863.62
  5. Step 5: Solve for x
    x = 38,689,360,863.62/185,615.10
  6. Step 6: Final answer
    x = 208,438.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.