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Finding the Fourth Proportional to 213,611.40, 320,465.70 and 124,819.20

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Solution

The fourth proportional to 213,611.40, 320,465.70 and 124,819.20 is: 187,257.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,611.40 : 320,465.70 = 124,819.20 : x
  2. Step 2: Convert to fraction form
    213,611.40/320,465.70 = 124,819.20/x
  3. Step 3: Cross multiply
    213,611.40x = 320,465.70 × 124,819.20
  4. Step 4: Simplify right side
    213,611.40x = 40,000,272,301.44
  5. Step 5: Solve for x
    x = 40,000,272,301.44/213,611.40
  6. Step 6: Final answer
    x = 187,257.20

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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.