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Finding the Fourth Proportional to 61,155.80, 84,412.50 and 36,019.88

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Solution

The fourth proportional to 61,155.80, 84,412.50 and 36,019.88 is: 49,717.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,155.80 : 84,412.50 = 36,019.88 : x
  2. Step 2: Convert to fraction form
    61,155.80/84,412.50 = 36,019.88/x
  3. Step 3: Cross multiply
    61,155.80x = 84,412.50 × 36,019.88
  4. Step 4: Simplify right side
    61,155.80x = 3,040,528,120.50
  5. Step 5: Solve for x
    x = 3,040,528,120.50/61,155.80
  6. Step 6: Final answer
    x = 49,717.74

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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.