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Finding the Fourth Proportional to 66,542.72, 91,758.76 and 51,437.84

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Solution

The fourth proportional to 66,542.72, 91,758.76 and 51,437.84 is: 70,929.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,542.72 : 91,758.76 = 51,437.84 : x
  2. Step 2: Convert to fraction form
    66,542.72/91,758.76 = 51,437.84/x
  3. Step 3: Cross multiply
    66,542.72x = 91,758.76 × 51,437.84
  4. Step 4: Simplify right side
    66,542.72x = 4,719,872,415.48
  5. Step 5: Solve for x
    x = 4,719,872,415.48/66,542.72
  6. Step 6: Final answer
    x = 70,929.96

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1.5x scale

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.