Home / 157,385.12-217,188.64-85,765.72

Finding the Fourth Proportional to 157,385.12, 217,188.64 and 85,765.72

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Solution

The fourth proportional to 157,385.12, 217,188.64 and 85,765.72 is: 118,355.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,385.12 : 217,188.64 = 85,765.72 : x
  2. Step 2: Convert to fraction form
    157,385.12/217,188.64 = 85,765.72/x
  3. Step 3: Cross multiply
    157,385.12x = 217,188.64 × 85,765.72
  4. Step 4: Simplify right side
    157,385.12x = 18,627,340,085.42
  5. Step 5: Solve for x
    x = 18,627,340,085.42/157,385.12
  6. Step 6: Final answer
    x = 118,355.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.