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Finding the Fourth Proportional to 121,745.85, 168,006.14 and 68,031.31

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Solution

The fourth proportional to 121,745.85, 168,006.14 and 68,031.31 is: 93,881.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,745.85 : 168,006.14 = 68,031.31 : x
  2. Step 2: Convert to fraction form
    121,745.85/168,006.14 = 68,031.31/x
  3. Step 3: Cross multiply
    121,745.85x = 168,006.14 × 68,031.31
  4. Step 4: Simplify right side
    121,745.85x = 11,429,676,797.76
  5. Step 5: Solve for x
    x = 11,429,676,797.76/121,745.85
  6. Step 6: Final answer
    x = 93,881.45

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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.