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Finding the Fourth Proportional to 87,258.60, 130,860.15 and 28,080.48

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Solution

The fourth proportional to 87,258.60, 130,860.15 and 28,080.48 is: 42,111.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,258.60 : 130,860.15 = 28,080.48 : x
  2. Step 2: Convert to fraction form
    87,258.60/130,860.15 = 28,080.48/x
  3. Step 3: Cross multiply
    87,258.60x = 130,860.15 × 28,080.48
  4. Step 4: Simplify right side
    87,258.60x = 3,674,615,824.87
  5. Step 5: Solve for x
    x = 3,674,615,824.87/87,258.60
  6. Step 6: Final answer
    x = 42,111.79

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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.