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Finding the Fourth Proportional to 89,903.97, 134,172.35 and 79,939.71

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Solution

The fourth proportional to 89,903.97, 134,172.35 and 79,939.71 is: 119,301.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,903.97 : 134,172.35 = 79,939.71 : x
  2. Step 2: Convert to fraction form
    89,903.97/134,172.35 = 79,939.71/x
  3. Step 3: Cross multiply
    89,903.97x = 134,172.35 × 79,939.71
  4. Step 4: Simplify right side
    89,903.97x = 10,725,698,349.32
  5. Step 5: Solve for x
    x = 10,725,698,349.32/89,903.97
  6. Step 6: Final answer
    x = 119,301.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.