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Finding the Fourth Proportional to 77,474.62, 115,918.66 and 45,901.63

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Solution

The fourth proportional to 77,474.62, 115,918.66 and 45,901.63 is: 68,678.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,474.62 : 115,918.66 = 45,901.63 : x
  2. Step 2: Convert to fraction form
    77,474.62/115,918.66 = 45,901.63/x
  3. Step 3: Cross multiply
    77,474.62x = 115,918.66 × 45,901.63
  4. Step 4: Simplify right side
    77,474.62x = 5,320,855,441.42
  5. Step 5: Solve for x
    x = 5,320,855,441.42/77,474.62
  6. Step 6: Final answer
    x = 68,678.69

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1.5x scale

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.