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Finding the Fourth Proportional to 255,987.90, 383,981.85 and 130,016.70

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Solution

The fourth proportional to 255,987.90, 383,981.85 and 130,016.70 is: 195,025.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,987.90 : 383,981.85 = 130,016.70 : x
  2. Step 2: Convert to fraction form
    255,987.90/383,981.85 = 130,016.70/x
  3. Step 3: Cross multiply
    255,987.90x = 383,981.85 × 130,016.70
  4. Step 4: Simplify right side
    255,987.90x = 49,924,052,996.90
  5. Step 5: Solve for x
    x = 49,924,052,996.90/255,987.90
  6. Step 6: Final answer
    x = 195,025.05

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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.