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Finding the Fourth Proportional to 61,065.75, 84,311.87 and 38,130.50

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Solution

The fourth proportional to 61,065.75, 84,311.87 and 38,130.50 is: 52,645.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,065.75 : 84,311.87 = 38,130.50 : x
  2. Step 2: Convert to fraction form
    61,065.75/84,311.87 = 38,130.50/x
  3. Step 3: Cross multiply
    61,065.75x = 84,311.87 × 38,130.50
  4. Step 4: Simplify right side
    61,065.75x = 3,214,853,519.39
  5. Step 5: Solve for x
    x = 3,214,853,519.39/61,065.75
  6. Step 6: Final answer
    x = 52,645.77

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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.