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Finding the Fourth Proportional to 86,788.80, 130,150.80 and 34,187.40

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Solution

The fourth proportional to 86,788.80, 130,150.80 and 34,187.40 is: 51,268.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,788.80 : 130,150.80 = 34,187.40 : x
  2. Step 2: Convert to fraction form
    86,788.80/130,150.80 = 34,187.40/x
  3. Step 3: Cross multiply
    86,788.80x = 130,150.80 × 34,187.40
  4. Step 4: Simplify right side
    86,788.80x = 4,449,517,459.92
  5. Step 5: Solve for x
    x = 4,449,517,459.92/86,788.80
  6. Step 6: Final answer
    x = 51,268.34

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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.