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Finding the Fourth Proportional to 155,438.72, 214,505.43 and 88,370.72

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Solution

The fourth proportional to 155,438.72, 214,505.43 and 88,370.72 is: 121,951.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,438.72 : 214,505.43 = 88,370.72 : x
  2. Step 2: Convert to fraction form
    155,438.72/214,505.43 = 88,370.72/x
  3. Step 3: Cross multiply
    155,438.72x = 214,505.43 × 88,370.72
  4. Step 4: Simplify right side
    155,438.72x = 18,955,999,829.27
  5. Step 5: Solve for x
    x = 18,955,999,829.27/155,438.72
  6. Step 6: Final answer
    x = 121,951.59

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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.