Home / 71,915.40-99,242.28-40,085.64

Finding the Fourth Proportional to 71,915.40, 99,242.28 and 40,085.64

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Solution

The fourth proportional to 71,915.40, 99,242.28 and 40,085.64 is: 55,317.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,915.40 : 99,242.28 = 40,085.64 : x
  2. Step 2: Convert to fraction form
    71,915.40/99,242.28 = 40,085.64/x
  3. Step 3: Cross multiply
    71,915.40x = 99,242.28 × 40,085.64
  4. Step 4: Simplify right side
    71,915.40x = 3,978,190,308.86
  5. Step 5: Solve for x
    x = 3,978,190,308.86/71,915.40
  6. Step 6: Final answer
    x = 55,317.64

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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.