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Finding the Fourth Proportional to 218,572.79, 301,622.33 and 121,774.37

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Solution

The fourth proportional to 218,572.79, 301,622.33 and 121,774.37 is: 168,044.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,572.79 : 301,622.33 = 121,774.37 : x
  2. Step 2: Convert to fraction form
    218,572.79/301,622.33 = 121,774.37/x
  3. Step 3: Cross multiply
    218,572.79x = 301,622.33 × 121,774.37
  4. Step 4: Simplify right side
    218,572.79x = 36,729,868,010.01
  5. Step 5: Solve for x
    x = 36,729,868,010.01/218,572.79
  6. Step 6: Final answer
    x = 168,044.10

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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.