Home / 142,129.20-212,934.60-115,690.80

Finding the Fourth Proportional to 142,129.20, 212,934.60 and 115,690.80

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Solution

The fourth proportional to 142,129.20, 212,934.60 and 115,690.80 is: 173,325.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,129.20 : 212,934.60 = 115,690.80 : x
  2. Step 2: Convert to fraction form
    142,129.20/212,934.60 = 115,690.80/x
  3. Step 3: Cross multiply
    142,129.20x = 212,934.60 × 115,690.80
  4. Step 4: Simplify right side
    142,129.20x = 24,634,574,221.68
  5. Step 5: Solve for x
    x = 24,634,574,221.68/142,129.20
  6. Step 6: Final answer
    x = 173,325.22

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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.