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Finding the Fourth Proportional to 86,574.78, 129,845.76 and 30,401.68

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Solution

The fourth proportional to 86,574.78, 129,845.76 and 30,401.68 is: 45,596.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,574.78 : 129,845.76 = 30,401.68 : x
  2. Step 2: Convert to fraction form
    86,574.78/129,845.76 = 30,401.68/x
  3. Step 3: Cross multiply
    86,574.78x = 129,845.76 × 30,401.68
  4. Step 4: Simplify right side
    86,574.78x = 3,947,529,244.88
  5. Step 5: Solve for x
    x = 3,947,529,244.88/86,574.78
  6. Step 6: Final answer
    x = 45,596.76

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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.