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Finding the Fourth Proportional to 61,391.80, 92,109.30 and 30,206.20

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Solution

The fourth proportional to 61,391.80, 92,109.30 and 30,206.20 is: 45,319.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,391.80 : 92,109.30 = 30,206.20 : x
  2. Step 2: Convert to fraction form
    61,391.80/92,109.30 = 30,206.20/x
  3. Step 3: Cross multiply
    61,391.80x = 92,109.30 × 30,206.20
  4. Step 4: Simplify right side
    61,391.80x = 2,782,271,937.66
  5. Step 5: Solve for x
    x = 2,782,271,937.66/61,391.80
  6. Step 6: Final answer
    x = 45,319.93

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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.