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Finding the Fourth Proportional to 68,715.76, 94,827.12 and 38,502.40

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Solution

The fourth proportional to 68,715.76, 94,827.12 and 38,502.40 is: 53,132.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,715.76 : 94,827.12 = 38,502.40 : x
  2. Step 2: Convert to fraction form
    68,715.76/94,827.12 = 38,502.40/x
  3. Step 3: Cross multiply
    68,715.76x = 94,827.12 × 38,502.40
  4. Step 4: Simplify right side
    68,715.76x = 3,651,071,705.09
  5. Step 5: Solve for x
    x = 3,651,071,705.09/68,715.76
  6. Step 6: Final answer
    x = 53,132.96

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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.