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Finding the Fourth Proportional to 247,397.81, 371,157.15 and 78,918.17

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Solution

The fourth proportional to 247,397.81, 371,157.15 and 78,918.17 is: 118,396.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,397.81 : 371,157.15 = 78,918.17 : x
  2. Step 2: Convert to fraction form
    247,397.81/371,157.15 = 78,918.17/x
  3. Step 3: Cross multiply
    247,397.81x = 371,157.15 × 78,918.17
  4. Step 4: Simplify right side
    247,397.81x = 29,291,041,204.63
  5. Step 5: Solve for x
    x = 29,291,041,204.63/247,397.81
  6. Step 6: Final answer
    x = 118,396.53

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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.