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Finding the Fourth Proportional to 87,292.85, 130,680.93 and 53,905.57

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Solution

The fourth proportional to 87,292.85, 130,680.93 and 53,905.57 is: 80,698.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,292.85 : 130,680.93 = 53,905.57 : x
  2. Step 2: Convert to fraction form
    87,292.85/130,680.93 = 53,905.57/x
  3. Step 3: Cross multiply
    87,292.85x = 130,680.93 × 53,905.57
  4. Step 4: Simplify right side
    87,292.85x = 7,044,429,693.08
  5. Step 5: Solve for x
    x = 7,044,429,693.08/87,292.85
  6. Step 6: Final answer
    x = 80,698.81

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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.