Home / 213,024.60-319,415.40-79,909.20

Finding the Fourth Proportional to 213,024.60, 319,415.40 and 79,909.20

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Solution

The fourth proportional to 213,024.60, 319,415.40 and 79,909.20 is: 119,818.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,024.60 : 319,415.40 = 79,909.20 : x
  2. Step 2: Convert to fraction form
    213,024.60/319,415.40 = 79,909.20/x
  3. Step 3: Cross multiply
    213,024.60x = 319,415.40 × 79,909.20
  4. Step 4: Simplify right side
    213,024.60x = 25,524,229,081.68
  5. Step 5: Solve for x
    x = 25,524,229,081.68/213,024.60
  6. Step 6: Final answer
    x = 119,818.22

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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.