Home / 157,200.20-235,652.06-78,239.78

Finding the Fourth Proportional to 157,200.20, 235,652.06 and 78,239.78

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Solution

The fourth proportional to 157,200.20, 235,652.06 and 78,239.78 is: 117,285.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,200.20 : 235,652.06 = 78,239.78 : x
  2. Step 2: Convert to fraction form
    157,200.20/235,652.06 = 78,239.78/x
  3. Step 3: Cross multiply
    157,200.20x = 235,652.06 × 78,239.78
  4. Step 4: Simplify right side
    157,200.20x = 18,437,365,330.95
  5. Step 5: Solve for x
    x = 18,437,365,330.95/157,200.20
  6. Step 6: Final answer
    x = 117,285.89

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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.