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Finding the Fourth Proportional to 126,781, 174,957.78 and 70,196.02

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Solution

The fourth proportional to 126,781, 174,957.78 and 70,196.02 is: 96,870.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,781 : 174,957.78 = 70,196.02 : x
  2. Step 2: Convert to fraction form
    126,781/174,957.78 = 70,196.02/x
  3. Step 3: Cross multiply
    126,781x = 174,957.78 × 70,196.02
  4. Step 4: Simplify right side
    126,781x = 12,281,339,824.04
  5. Step 5: Solve for x
    x = 12,281,339,824.04/126,781
  6. Step 6: Final answer
    x = 96,870.51

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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.