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Finding the Fourth Proportional to 86,480.80, 129,486.70 and 44,840.32

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Solution

The fourth proportional to 86,480.80, 129,486.70 and 44,840.32 is: 67,138.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,480.80 : 129,486.70 = 44,840.32 : x
  2. Step 2: Convert to fraction form
    86,480.80/129,486.70 = 44,840.32/x
  3. Step 3: Cross multiply
    86,480.80x = 129,486.70 × 44,840.32
  4. Step 4: Simplify right side
    86,480.80x = 5,806,225,063.74
  5. Step 5: Solve for x
    x = 5,806,225,063.74/86,480.80
  6. Step 6: Final answer
    x = 67,138.89

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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.