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Finding the Fourth Proportional to 61,271.20, 91,906.80 and 51,248.80

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Solution

The fourth proportional to 61,271.20, 91,906.80 and 51,248.80 is: 76,873.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,271.20 : 91,906.80 = 51,248.80 : x
  2. Step 2: Convert to fraction form
    61,271.20/91,906.80 = 51,248.80/x
  3. Step 3: Cross multiply
    61,271.20x = 91,906.80 × 51,248.80
  4. Step 4: Simplify right side
    61,271.20x = 4,710,113,211.84
  5. Step 5: Solve for x
    x = 4,710,113,211.84/61,271.20
  6. Step 6: Final answer
    x = 76,873.20

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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.