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Finding the Fourth Proportional to 126,670.95, 189,627.78 and 76,599.57

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Solution

The fourth proportional to 126,670.95, 189,627.78 and 76,599.57 is: 114,670.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,670.95 : 189,627.78 = 76,599.57 : x
  2. Step 2: Convert to fraction form
    126,670.95/189,627.78 = 76,599.57/x
  3. Step 3: Cross multiply
    126,670.95x = 189,627.78 × 76,599.57
  4. Step 4: Simplify right side
    126,670.95x = 14,525,406,408.05
  5. Step 5: Solve for x
    x = 14,525,406,408.05/126,670.95
  6. Step 6: Final answer
    x = 114,670.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.