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Finding the Fourth Proportional to 83,629.80, 115,408.14 and 45,389.40

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Solution

The fourth proportional to 83,629.80, 115,408.14 and 45,389.40 is: 62,636.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,629.80 : 115,408.14 = 45,389.40 : x
  2. Step 2: Convert to fraction form
    83,629.80/115,408.14 = 45,389.40/x
  3. Step 3: Cross multiply
    83,629.80x = 115,408.14 × 45,389.40
  4. Step 4: Simplify right side
    83,629.80x = 5,238,306,229.72
  5. Step 5: Solve for x
    x = 5,238,306,229.72/83,629.80
  6. Step 6: Final answer
    x = 62,636.84

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1.5x scale

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.