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Finding the Fourth Proportional to 247,186.13, 370,817.87 and 78,744.20

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Solution

The fourth proportional to 247,186.13, 370,817.87 and 78,744.20 is: 118,128.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,186.13 : 370,817.87 = 78,744.20 : x
  2. Step 2: Convert to fraction form
    247,186.13/370,817.87 = 78,744.20/x
  3. Step 3: Cross multiply
    247,186.13x = 370,817.87 × 78,744.20
  4. Step 4: Simplify right side
    247,186.13x = 29,199,754,271.04
  5. Step 5: Solve for x
    x = 29,199,754,271.04/247,186.13
  6. Step 6: Final answer
    x = 118,128.61

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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.