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Finding the Fourth Proportional to 151,679.70, 209,316.60 and 83,697.30

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Solution

The fourth proportional to 151,679.70, 209,316.60 and 83,697.30 is: 115,501.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,679.70 : 209,316.60 = 83,697.30 : x
  2. Step 2: Convert to fraction form
    151,679.70/209,316.60 = 83,697.30/x
  3. Step 3: Cross multiply
    151,679.70x = 209,316.60 × 83,697.30
  4. Step 4: Simplify right side
    151,679.70x = 17,519,234,265.18
  5. Step 5: Solve for x
    x = 17,519,234,265.18/151,679.70
  6. Step 6: Final answer
    x = 115,501.51

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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.