Home / 157,138.74-235,589.31-78,308.64

Finding the Fourth Proportional to 157,138.74, 235,589.31 and 78,308.64

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Solution

The fourth proportional to 157,138.74, 235,589.31 and 78,308.64 is: 117,403.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,138.74 : 235,589.31 = 78,308.64 : x
  2. Step 2: Convert to fraction form
    157,138.74/235,589.31 = 78,308.64/x
  3. Step 3: Cross multiply
    157,138.74x = 235,589.31 × 78,308.64
  4. Step 4: Simplify right side
    157,138.74x = 18,448,678,464.64
  5. Step 5: Solve for x
    x = 18,448,678,464.64/157,138.74
  6. Step 6: Final answer
    x = 117,403.76

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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.