Home / 70,395.28-97,121.18-40,158.78

Finding the Fourth Proportional to 70,395.28, 97,121.18 and 40,158.78

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Solution

The fourth proportional to 70,395.28, 97,121.18 and 40,158.78 is: 55,405.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,395.28 : 97,121.18 = 40,158.78 : x
  2. Step 2: Convert to fraction form
    70,395.28/97,121.18 = 40,158.78/x
  3. Step 3: Cross multiply
    70,395.28x = 97,121.18 × 40,158.78
  4. Step 4: Simplify right side
    70,395.28x = 3,900,268,100.96
  5. Step 5: Solve for x
    x = 3,900,268,100.96/70,395.28
  6. Step 6: Final answer
    x = 55,405.25

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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.