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Finding the Fourth Proportional to 256,062.60, 384,057.45 and 87,590.70

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Solution

The fourth proportional to 256,062.60, 384,057.45 and 87,590.70 is: 131,373.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,062.60 : 384,057.45 = 87,590.70 : x
  2. Step 2: Convert to fraction form
    256,062.60/384,057.45 = 87,590.70/x
  3. Step 3: Cross multiply
    256,062.60x = 384,057.45 × 87,590.70
  4. Step 4: Simplify right side
    256,062.60x = 33,639,860,885.72
  5. Step 5: Solve for x
    x = 33,639,860,885.72/256,062.60
  6. Step 6: Final answer
    x = 131,373.58

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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.