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Finding the Fourth Proportional to 61,406.20, 92,012.10 and 51,491.80

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Solution

The fourth proportional to 61,406.20, 92,012.10 and 51,491.80 is: 77,156.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,406.20 : 92,012.10 = 51,491.80 : x
  2. Step 2: Convert to fraction form
    61,406.20/92,012.10 = 51,491.80/x
  3. Step 3: Cross multiply
    61,406.20x = 92,012.10 × 51,491.80
  4. Step 4: Simplify right side
    61,406.20x = 4,737,868,650.78
  5. Step 5: Solve for x
    x = 4,737,868,650.78/61,406.20
  6. Step 6: Final answer
    x = 77,156.19

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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.