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Finding the Fourth Proportional to 121,900.72, 168,224.28 and 71,600.56

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Solution

The fourth proportional to 121,900.72, 168,224.28 and 71,600.56 is: 98,809.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,900.72 : 168,224.28 = 71,600.56 : x
  2. Step 2: Convert to fraction form
    121,900.72/168,224.28 = 71,600.56/x
  3. Step 3: Cross multiply
    121,900.72x = 168,224.28 × 71,600.56
  4. Step 4: Simplify right side
    121,900.72x = 12,044,952,653.60
  5. Step 5: Solve for x
    x = 12,044,952,653.60/121,900.72
  6. Step 6: Final answer
    x = 98,809.53

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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.