Home / 218,948.20-328,422.30-85,784.20

Finding the Fourth Proportional to 218,948.20, 328,422.30 and 85,784.20

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Solution

The fourth proportional to 218,948.20, 328,422.30 and 85,784.20 is: 128,676.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,948.20 : 328,422.30 = 85,784.20 : x
  2. Step 2: Convert to fraction form
    218,948.20/328,422.30 = 85,784.20/x
  3. Step 3: Cross multiply
    218,948.20x = 328,422.30 × 85,784.20
  4. Step 4: Simplify right side
    218,948.20x = 28,173,444,267.66
  5. Step 5: Solve for x
    x = 28,173,444,267.66/218,948.20
  6. Step 6: Final answer
    x = 128,676.30

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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.