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Finding the Fourth Proportional to 87,988.64, 121,395.76 and 49,744.48

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Solution

The fourth proportional to 87,988.64, 121,395.76 and 49,744.48 is: 68,631.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,988.64 : 121,395.76 = 49,744.48 : x
  2. Step 2: Convert to fraction form
    87,988.64/121,395.76 = 49,744.48/x
  3. Step 3: Cross multiply
    87,988.64x = 121,395.76 × 49,744.48
  4. Step 4: Simplify right side
    87,988.64x = 6,038,768,955.40
  5. Step 5: Solve for x
    x = 6,038,768,955.40/87,988.64
  6. Step 6: Final answer
    x = 68,631.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.