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Finding the Fourth Proportional to 247,054.66, 370,578.09 and 78,572.55

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Solution

The fourth proportional to 247,054.66, 370,578.09 and 78,572.55 is: 117,857.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,054.66 : 370,578.09 = 78,572.55 : x
  2. Step 2: Convert to fraction form
    247,054.66/370,578.09 = 78,572.55/x
  3. Step 3: Cross multiply
    247,054.66x = 370,578.09 × 78,572.55
  4. Step 4: Simplify right side
    247,054.66x = 29,117,267,189.74
  5. Step 5: Solve for x
    x = 29,117,267,189.74/247,054.66
  6. Step 6: Final answer
    x = 117,857.59

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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.