Home / 86,540.64-129,812.04-30,378.48

Finding the Fourth Proportional to 86,540.64, 129,812.04 and 30,378.48

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Solution

The fourth proportional to 86,540.64, 129,812.04 and 30,378.48 is: 45,568.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,540.64 : 129,812.04 = 30,378.48 : x
  2. Step 2: Convert to fraction form
    86,540.64/129,812.04 = 30,378.48/x
  3. Step 3: Cross multiply
    86,540.64x = 129,812.04 × 30,378.48
  4. Step 4: Simplify right side
    86,540.64x = 3,943,492,460.90
  5. Step 5: Solve for x
    x = 3,943,492,460.90/86,540.64
  6. Step 6: Final answer
    x = 45,568.10

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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.