Home / 157,201.20-235,653.57-78,240.78

Finding the Fourth Proportional to 157,201.20, 235,653.57 and 78,240.78

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Solution

The fourth proportional to 157,201.20, 235,653.57 and 78,240.78 is: 117,287.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,201.20 : 235,653.57 = 78,240.78 : x
  2. Step 2: Convert to fraction form
    157,201.20/235,653.57 = 78,240.78/x
  3. Step 3: Cross multiply
    157,201.20x = 235,653.57 × 78,240.78
  4. Step 4: Simplify right side
    157,201.20x = 18,437,719,126.58
  5. Step 5: Solve for x
    x = 18,437,719,126.58/157,201.20
  6. Step 6: Final answer
    x = 117,287.39

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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.