Home / 121,113.55-167,103.13-72,702.91

Finding the Fourth Proportional to 121,113.55, 167,103.13 and 72,702.91

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Solution

The fourth proportional to 121,113.55, 167,103.13 and 72,702.91 is: 100,309.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,113.55 : 167,103.13 = 72,702.91 : x
  2. Step 2: Convert to fraction form
    121,113.55/167,103.13 = 72,702.91/x
  3. Step 3: Cross multiply
    121,113.55x = 167,103.13 × 72,702.91
  4. Step 4: Simplify right side
    121,113.55x = 12,148,883,821.11
  5. Step 5: Solve for x
    x = 12,148,883,821.11/121,113.55
  6. Step 6: Final answer
    x = 100,309.86

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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.