Home / 157,311.90-236,121.45-78,515.10

Finding the Fourth Proportional to 157,311.90, 236,121.45 and 78,515.10

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Solution

The fourth proportional to 157,311.90, 236,121.45 and 78,515.10 is: 117,849.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,311.90 : 236,121.45 = 78,515.10 : x
  2. Step 2: Convert to fraction form
    157,311.90/236,121.45 = 78,515.10/x
  3. Step 3: Cross multiply
    157,311.90x = 236,121.45 × 78,515.10
  4. Step 4: Simplify right side
    157,311.90x = 18,539,099,258.90
  5. Step 5: Solve for x
    x = 18,539,099,258.90/157,311.90
  6. Step 6: Final answer
    x = 117,849.31

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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.