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Finding the Fourth Proportional to 74,376.70, 102,639.96 and 40,384.69

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Solution

The fourth proportional to 74,376.70, 102,639.96 and 40,384.69 is: 55,730.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,376.70 : 102,639.96 = 40,384.69 : x
  2. Step 2: Convert to fraction form
    74,376.70/102,639.96 = 40,384.69/x
  3. Step 3: Cross multiply
    74,376.70x = 102,639.96 × 40,384.69
  4. Step 4: Simplify right side
    74,376.70x = 4,145,082,709.61
  5. Step 5: Solve for x
    x = 4,145,082,709.61/74,376.70
  6. Step 6: Final answer
    x = 55,730.93

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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.