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Finding the Fourth Proportional to 126,970, 175,218.76 and 70,389.84

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Solution

The fourth proportional to 126,970, 175,218.76 and 70,389.84 is: 97,138.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,970 : 175,218.76 = 70,389.84 : x
  2. Step 2: Convert to fraction form
    126,970/175,218.76 = 70,389.84/x
  3. Step 3: Cross multiply
    126,970x = 175,218.76 × 70,389.84
  4. Step 4: Simplify right side
    126,970x = 12,333,620,481.40
  5. Step 5: Solve for x
    x = 12,333,620,481.40/126,970
  6. Step 6: Final answer
    x = 97,138.07

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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.