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Finding the Fourth Proportional to 61,505.20, 92,128.20 and 51,137.20

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Solution

The fourth proportional to 61,505.20, 92,128.20 and 51,137.20 is: 76,598.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,505.20 : 92,128.20 = 51,137.20 : x
  2. Step 2: Convert to fraction form
    61,505.20/92,128.20 = 51,137.20/x
  3. Step 3: Cross multiply
    61,505.20x = 92,128.20 × 51,137.20
  4. Step 4: Simplify right side
    61,505.20x = 4,711,178,189.04
  5. Step 5: Solve for x
    x = 4,711,178,189.04/61,505.20
  6. Step 6: Final answer
    x = 76,598.05

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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.