Home / 253,129.20-379,693.80-66,140.70

Finding the Fourth Proportional to 253,129.20, 379,693.80 and 66,140.70

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Solution

The fourth proportional to 253,129.20, 379,693.80 and 66,140.70 is: 99,211.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,129.20 : 379,693.80 = 66,140.70 : x
  2. Step 2: Convert to fraction form
    253,129.20/379,693.80 = 66,140.70/x
  3. Step 3: Cross multiply
    253,129.20x = 379,693.80 × 66,140.70
  4. Step 4: Simplify right side
    253,129.20x = 25,113,213,717.66
  5. Step 5: Solve for x
    x = 25,113,213,717.66/253,129.20
  6. Step 6: Final answer
    x = 99,211.05

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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.