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Finding the Fourth Proportional to 86,479.80, 129,485.21 and 44,839.32

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Solution

The fourth proportional to 86,479.80, 129,485.21 and 44,839.32 is: 67,137.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,479.80 : 129,485.21 = 44,839.32 : x
  2. Step 2: Convert to fraction form
    86,479.80/129,485.21 = 44,839.32/x
  3. Step 3: Cross multiply
    86,479.80x = 129,485.21 × 44,839.32
  4. Step 4: Simplify right side
    86,479.80x = 5,806,028,542.26
  5. Step 5: Solve for x
    x = 5,806,028,542.26/86,479.80
  6. Step 6: Final answer
    x = 67,137.40

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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.