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Finding the Fourth Proportional to 121,722.48, 168,191.64 and 93,670.56

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Solution

The fourth proportional to 121,722.48, 168,191.64 and 93,670.56 is: 129,430.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,722.48 : 168,191.64 = 93,670.56 : x
  2. Step 2: Convert to fraction form
    121,722.48/168,191.64 = 93,670.56/x
  3. Step 3: Cross multiply
    121,722.48x = 168,191.64 × 93,670.56
  4. Step 4: Simplify right side
    121,722.48x = 15,754,605,106.12
  5. Step 5: Solve for x
    x = 15,754,605,106.12/121,722.48
  6. Step 6: Final answer
    x = 129,430.53

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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.