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Finding the Fourth Proportional to 86,331, 129,453.11 and 50,319.06

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Solution

The fourth proportional to 86,331, 129,453.11 and 50,319.06 is: 75,453.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,331 : 129,453.11 = 50,319.06 : x
  2. Step 2: Convert to fraction form
    86,331/129,453.11 = 50,319.06/x
  3. Step 3: Cross multiply
    86,331x = 129,453.11 × 50,319.06
  4. Step 4: Simplify right side
    86,331x = 6,513,958,809.28
  5. Step 5: Solve for x
    x = 6,513,958,809.28/86,331
  6. Step 6: Final answer
    x = 75,453.30

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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.