Home / 129,176.54-178,266.04-71,820.66

Finding the Fourth Proportional to 129,176.54, 178,266.04 and 71,820.66

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Solution

The fourth proportional to 129,176.54, 178,266.04 and 71,820.66 is: 99,113.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,176.54 : 178,266.04 = 71,820.66 : x
  2. Step 2: Convert to fraction form
    129,176.54/178,266.04 = 71,820.66/x
  3. Step 3: Cross multiply
    129,176.54x = 178,266.04 × 71,820.66
  4. Step 4: Simplify right side
    129,176.54x = 12,803,184,648.39
  5. Step 5: Solve for x
    x = 12,803,184,648.39/129,176.54
  6. Step 6: Final answer
    x = 99,113.85

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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.