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Finding the Fourth Proportional to 101,428.92, 151,400.25 and 89,458.38

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Solution

The fourth proportional to 101,428.92, 151,400.25 and 89,458.38 is: 133,532.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,428.92 : 151,400.25 = 89,458.38 : x
  2. Step 2: Convert to fraction form
    101,428.92/151,400.25 = 89,458.38/x
  3. Step 3: Cross multiply
    101,428.92x = 151,400.25 × 89,458.38
  4. Step 4: Simplify right side
    101,428.92x = 13,544,021,096.60
  5. Step 5: Solve for x
    x = 13,544,021,096.60/101,428.92
  6. Step 6: Final answer
    x = 133,532.14

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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.