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Finding the Fourth Proportional to 121,745.08, 168,014.70 and 68,031.40

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Solution

The fourth proportional to 121,745.08, 168,014.70 and 68,031.40 is: 93,886.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,745.08 : 168,014.70 = 68,031.40 : x
  2. Step 2: Convert to fraction form
    121,745.08/168,014.70 = 68,031.40/x
  3. Step 3: Cross multiply
    121,745.08x = 168,014.70 × 68,031.40
  4. Step 4: Simplify right side
    121,745.08x = 11,430,275,261.58
  5. Step 5: Solve for x
    x = 11,430,275,261.58/121,745.08
  6. Step 6: Final answer
    x = 93,886.96

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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.