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Finding the Fourth Proportional to 255,939.68, 383,909.48 and 87,461.46

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Solution

The fourth proportional to 255,939.68, 383,909.48 and 87,461.46 is: 131,192.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,939.68 : 383,909.48 = 87,461.46 : x
  2. Step 2: Convert to fraction form
    255,939.68/383,909.48 = 87,461.46/x
  3. Step 3: Cross multiply
    255,939.68x = 383,909.48 × 87,461.46
  4. Step 4: Simplify right side
    255,939.68x = 33,577,283,191.33
  5. Step 5: Solve for x
    x = 33,577,283,191.33/255,939.68
  6. Step 6: Final answer
    x = 131,192.18

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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.