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Finding the Fourth Proportional to 55,605.70, 83,408.55 and 31,986.10

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Solution

The fourth proportional to 55,605.70, 83,408.55 and 31,986.10 is: 47,979.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,605.70 : 83,408.55 = 31,986.10 : x
  2. Step 2: Convert to fraction form
    55,605.70/83,408.55 = 31,986.10/x
  3. Step 3: Cross multiply
    55,605.70x = 83,408.55 × 31,986.10
  4. Step 4: Simplify right side
    55,605.70x = 2,667,914,221.16
  5. Step 5: Solve for x
    x = 2,667,914,221.16/55,605.70
  6. Step 6: Final answer
    x = 47,979.15

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1.5x scale

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.