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Finding the Fourth Proportional to 121,875.76, 168,183.56 and 70,889.95

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Solution

The fourth proportional to 121,875.76, 168,183.56 and 70,889.95 is: 97,825.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,875.76 : 168,183.56 = 70,889.95 : x
  2. Step 2: Convert to fraction form
    121,875.76/168,183.56 = 70,889.95/x
  3. Step 3: Cross multiply
    121,875.76x = 168,183.56 × 70,889.95
  4. Step 4: Simplify right side
    121,875.76x = 11,922,522,963.85
  5. Step 5: Solve for x
    x = 11,922,522,963.85/121,875.76
  6. Step 6: Final answer
    x = 97,825.22

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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.