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Finding the Fourth Proportional to 98,152.94, 135,377.78 and 66,288.62

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Solution

The fourth proportional to 98,152.94, 135,377.78 and 66,288.62 is: 91,428.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,152.94 : 135,377.78 = 66,288.62 : x
  2. Step 2: Convert to fraction form
    98,152.94/135,377.78 = 66,288.62/x
  3. Step 3: Cross multiply
    98,152.94x = 135,377.78 × 66,288.62
  4. Step 4: Simplify right side
    98,152.94x = 8,974,006,214.86
  5. Step 5: Solve for x
    x = 8,974,006,214.86/98,152.94
  6. Step 6: Final answer
    x = 91,428.81

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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.