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Finding the Fourth Proportional to 161,403.70, 242,105.55 and 91,419.70

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Solution

The fourth proportional to 161,403.70, 242,105.55 and 91,419.70 is: 137,129.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,403.70 : 242,105.55 = 91,419.70 : x
  2. Step 2: Convert to fraction form
    161,403.70/242,105.55 = 91,419.70/x
  3. Step 3: Cross multiply
    161,403.70x = 242,105.55 × 91,419.70
  4. Step 4: Simplify right side
    161,403.70x = 22,133,216,749.34
  5. Step 5: Solve for x
    x = 22,133,216,749.34/161,403.70
  6. Step 6: Final answer
    x = 137,129.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.