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Finding the Fourth Proportional to 121,909, 168,270.48 and 70,944.76

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Solution

The fourth proportional to 121,909, 168,270.48 and 70,944.76 is: 97,924.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,909 : 168,270.48 = 70,944.76 : x
  2. Step 2: Convert to fraction form
    121,909/168,270.48 = 70,944.76/x
  3. Step 3: Cross multiply
    121,909x = 168,270.48 × 70,944.76
  4. Step 4: Simplify right side
    121,909x = 11,937,908,818.68
  5. Step 5: Solve for x
    x = 11,937,908,818.68/121,909
  6. Step 6: Final answer
    x = 97,924.75

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1.5x scale

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.