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Finding the Fourth Proportional to 66,560.40, 91,711.44 and 51,455.52

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Solution

The fourth proportional to 66,560.40, 91,711.44 and 51,455.52 is: 70,898.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,560.40 : 91,711.44 = 51,455.52 : x
  2. Step 2: Convert to fraction form
    66,560.40/91,711.44 = 51,455.52/x
  3. Step 3: Cross multiply
    66,560.40x = 91,711.44 × 51,455.52
  4. Step 4: Simplify right side
    66,560.40x = 4,719,059,835.15
  5. Step 5: Solve for x
    x = 4,719,059,835.15/66,560.40
  6. Step 6: Final answer
    x = 70,898.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.