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Finding the Fourth Proportional to 67,431.84, 93,061.02 and 39,141.78

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Solution

The fourth proportional to 67,431.84, 93,061.02 and 39,141.78 is: 54,018.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,431.84 : 93,061.02 = 39,141.78 : x
  2. Step 2: Convert to fraction form
    67,431.84/93,061.02 = 39,141.78/x
  3. Step 3: Cross multiply
    67,431.84x = 93,061.02 × 39,141.78
  4. Step 4: Simplify right side
    67,431.84x = 3,642,573,971.42
  5. Step 5: Solve for x
    x = 3,642,573,971.42/67,431.84
  6. Step 6: Final answer
    x = 54,018.61

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.