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Finding the Fourth Proportional to 86,539.20, 129,808.80 and 49,084.80

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Solution

The fourth proportional to 86,539.20, 129,808.80 and 49,084.80 is: 73,627.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,539.20 : 129,808.80 = 49,084.80 : x
  2. Step 2: Convert to fraction form
    86,539.20/129,808.80 = 49,084.80/x
  3. Step 3: Cross multiply
    86,539.20x = 129,808.80 × 49,084.80
  4. Step 4: Simplify right side
    86,539.20x = 6,371,638,986.24
  5. Step 5: Solve for x
    x = 6,371,638,986.24/86,539.20
  6. Step 6: Final answer
    x = 73,627.20

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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.