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Finding the Fourth Proportional to 70,973.71, 106,278.76 and 68,871.49

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Solution

The fourth proportional to 70,973.71, 106,278.76 and 68,871.49 is: 103,130.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,973.71 : 106,278.76 = 68,871.49 : x
  2. Step 2: Convert to fraction form
    70,973.71/106,278.76 = 68,871.49/x
  3. Step 3: Cross multiply
    70,973.71x = 106,278.76 × 68,871.49
  4. Step 4: Simplify right side
    70,973.71x = 7,319,576,556.55
  5. Step 5: Solve for x
    x = 7,319,576,556.55/70,973.71
  6. Step 6: Final answer
    x = 103,130.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.