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Finding the Fourth Proportional to 61,154.85, 91,720.67 and 19,035.45

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Solution

The fourth proportional to 61,154.85, 91,720.67 and 19,035.45 is: 28,549.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,154.85 : 91,720.67 = 19,035.45 : x
  2. Step 2: Convert to fraction form
    61,154.85/91,720.67 = 19,035.45/x
  3. Step 3: Cross multiply
    61,154.85x = 91,720.67 × 19,035.45
  4. Step 4: Simplify right side
    61,154.85x = 1,745,944,227.75
  5. Step 5: Solve for x
    x = 1,745,944,227.75/61,154.85
  6. Step 6: Final answer
    x = 28,549.56

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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.