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Finding the Fourth Proportional to 86,310.72, 129,478.77 and 44,214.57

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Solution

The fourth proportional to 86,310.72, 129,478.77 and 44,214.57 is: 66,328.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,310.72 : 129,478.77 = 44,214.57 : x
  2. Step 2: Convert to fraction form
    86,310.72/129,478.77 = 44,214.57/x
  3. Step 3: Cross multiply
    86,310.72x = 129,478.77 × 44,214.57
  4. Step 4: Simplify right side
    86,310.72x = 5,724,848,139.68
  5. Step 5: Solve for x
    x = 5,724,848,139.68/86,310.72
  6. Step 6: Final answer
    x = 66,328.36

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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.