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Finding the Fourth Proportional to 113,309.80, 169,980.90 and 38,433.40

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Solution

The fourth proportional to 113,309.80, 169,980.90 and 38,433.40 is: 57,655.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,309.80 : 169,980.90 = 38,433.40 : x
  2. Step 2: Convert to fraction form
    113,309.80/169,980.90 = 38,433.40/x
  3. Step 3: Cross multiply
    113,309.80x = 169,980.90 × 38,433.40
  4. Step 4: Simplify right side
    113,309.80x = 6,532,943,922.06
  5. Step 5: Solve for x
    x = 6,532,943,922.06/113,309.80
  6. Step 6: Final answer
    x = 57,655.59

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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.