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Finding the Fourth Proportional to 77,169.75, 106,507.91 and 45,338.64

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Solution

The fourth proportional to 77,169.75, 106,507.91 and 45,338.64 is: 62,575.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,169.75 : 106,507.91 = 45,338.64 : x
  2. Step 2: Convert to fraction form
    77,169.75/106,507.91 = 45,338.64/x
  3. Step 3: Cross multiply
    77,169.75x = 106,507.91 × 45,338.64
  4. Step 4: Simplify right side
    77,169.75x = 4,828,923,561.95
  5. Step 5: Solve for x
    x = 4,828,923,561.95/77,169.75
  6. Step 6: Final answer
    x = 62,575.34

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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.