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Finding the Fourth Proportional to 140,373.72, 193,718.34 and 76,715.64

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Solution

The fourth proportional to 140,373.72, 193,718.34 and 76,715.64 is: 105,869.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,373.72 : 193,718.34 = 76,715.64 : x
  2. Step 2: Convert to fraction form
    140,373.72/193,718.34 = 76,715.64/x
  3. Step 3: Cross multiply
    140,373.72x = 193,718.34 × 76,715.64
  4. Step 4: Simplify right side
    140,373.72x = 14,861,226,432.84
  5. Step 5: Solve for x
    x = 14,861,226,432.84/140,373.72
  6. Step 6: Final answer
    x = 105,869.01

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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.