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Finding the Fourth Proportional to 86,987.43, 130,512.24 and 53,668.71

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Solution

The fourth proportional to 86,987.43, 130,512.24 and 53,668.71 is: 80,522.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,987.43 : 130,512.24 = 53,668.71 : x
  2. Step 2: Convert to fraction form
    86,987.43/130,512.24 = 53,668.71/x
  3. Step 3: Cross multiply
    86,987.43x = 130,512.24 × 53,668.71
  4. Step 4: Simplify right side
    86,987.43x = 7,004,423,560.01
  5. Step 5: Solve for x
    x = 7,004,423,560.01/86,987.43
  6. Step 6: Final answer
    x = 80,522.25

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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.