Home / 99,213.21-136,915.90-53,891.28

Finding the Fourth Proportional to 99,213.21, 136,915.90 and 53,891.28

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Solution

The fourth proportional to 99,213.21, 136,915.90 and 53,891.28 is: 74,370.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,213.21 : 136,915.90 = 53,891.28 : x
  2. Step 2: Convert to fraction form
    99,213.21/136,915.90 = 53,891.28/x
  3. Step 3: Cross multiply
    99,213.21x = 136,915.90 × 53,891.28
  4. Step 4: Simplify right side
    99,213.21x = 7,378,572,968.62
  5. Step 5: Solve for x
    x = 7,378,572,968.62/99,213.21
  6. Step 6: Final answer
    x = 74,370.87

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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.