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Finding the Fourth Proportional to 82,880.40, 124,223.40 and 43,417.20

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Solution

The fourth proportional to 82,880.40, 124,223.40 and 43,417.20 is: 65,074.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,880.40 : 124,223.40 = 43,417.20 : x
  2. Step 2: Convert to fraction form
    82,880.40/124,223.40 = 43,417.20/x
  3. Step 3: Cross multiply
    82,880.40x = 124,223.40 × 43,417.20
  4. Step 4: Simplify right side
    82,880.40x = 5,393,432,202.48
  5. Step 5: Solve for x
    x = 5,393,432,202.48/82,880.40
  6. Step 6: Final answer
    x = 65,074.88

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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.