Home / 121,112.55-167,101.76-72,701.91

Finding the Fourth Proportional to 121,112.55, 167,101.76 and 72,701.91

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Solution

The fourth proportional to 121,112.55, 167,101.76 and 72,701.91 is: 100,308.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,112.55 : 167,101.76 = 72,701.91 : x
  2. Step 2: Convert to fraction form
    121,112.55/167,101.76 = 72,701.91/x
  3. Step 3: Cross multiply
    121,112.55x = 167,101.76 × 72,701.91
  4. Step 4: Simplify right side
    121,112.55x = 12,148,616,752.85
  5. Step 5: Solve for x
    x = 12,148,616,752.85/121,112.55
  6. Step 6: Final answer
    x = 100,308.49

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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.