Home / 99,721.31-149,580.80-28,645.68

Finding the Fourth Proportional to 99,721.31, 149,580.80 and 28,645.68

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Solution

The fourth proportional to 99,721.31, 149,580.80 and 28,645.68 is: 42,968.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,721.31 : 149,580.80 = 28,645.68 : x
  2. Step 2: Convert to fraction form
    99,721.31/149,580.80 = 28,645.68/x
  3. Step 3: Cross multiply
    99,721.31x = 149,580.80 × 28,645.68
  4. Step 4: Simplify right side
    99,721.31x = 4,284,844,585.03
  5. Step 5: Solve for x
    x = 4,284,844,585.03/99,721.31
  6. Step 6: Final answer
    x = 42,968.20

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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.