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Finding the Fourth Proportional to 86,716.40, 130,074.60 and 55,612.40

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Solution

The fourth proportional to 86,716.40, 130,074.60 and 55,612.40 is: 83,418.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,716.40 : 130,074.60 = 55,612.40 : x
  2. Step 2: Convert to fraction form
    86,716.40/130,074.60 = 55,612.40/x
  3. Step 3: Cross multiply
    86,716.40x = 130,074.60 × 55,612.40
  4. Step 4: Simplify right side
    86,716.40x = 7,233,760,685.04
  5. Step 5: Solve for x
    x = 7,233,760,685.04/86,716.40
  6. Step 6: Final answer
    x = 83,418.60

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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.