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Finding the Fourth Proportional to 151,154.88, 208,614.72 and 87,512.64

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Solution

The fourth proportional to 151,154.88, 208,614.72 and 87,512.64 is: 120,779.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,154.88 : 208,614.72 = 87,512.64 : x
  2. Step 2: Convert to fraction form
    151,154.88/208,614.72 = 87,512.64/x
  3. Step 3: Cross multiply
    151,154.88x = 208,614.72 × 87,512.64
  4. Step 4: Simplify right side
    151,154.88x = 18,256,424,890.06
  5. Step 5: Solve for x
    x = 18,256,424,890.06/151,154.88
  6. Step 6: Final answer
    x = 120,779.59

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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.