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Finding the Fourth Proportional to 255,705.80, 383,598.11 and 87,186.71

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Solution

The fourth proportional to 255,705.80, 383,598.11 and 87,186.71 is: 130,793.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,705.80 : 383,598.11 = 87,186.71 : x
  2. Step 2: Convert to fraction form
    255,705.80/383,598.11 = 87,186.71/x
  3. Step 3: Cross multiply
    255,705.80x = 383,598.11 × 87,186.71
  4. Step 4: Simplify right side
    255,705.80x = 33,444,654,819.19
  5. Step 5: Solve for x
    x = 33,444,654,819.19/255,705.80
  6. Step 6: Final answer
    x = 130,793.50

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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.