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Finding the Fourth Proportional to 66,274.77, 99,138.78 and 42,545.82

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Solution

The fourth proportional to 66,274.77, 99,138.78 and 42,545.82 is: 63,643.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,274.77 : 99,138.78 = 42,545.82 : x
  2. Step 2: Convert to fraction form
    66,274.77/99,138.78 = 42,545.82/x
  3. Step 3: Cross multiply
    66,274.77x = 99,138.78 × 42,545.82
  4. Step 4: Simplify right side
    66,274.77x = 4,217,940,688.90
  5. Step 5: Solve for x
    x = 4,217,940,688.90/66,274.77
  6. Step 6: Final answer
    x = 63,643.23

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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.