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Finding the Fourth Proportional to 315,422.62, 473,131.50 and 78,763.72

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Solution

The fourth proportional to 315,422.62, 473,131.50 and 78,763.72 is: 118,144.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,422.62 : 473,131.50 = 78,763.72 : x
  2. Step 2: Convert to fraction form
    315,422.62/473,131.50 = 78,763.72/x
  3. Step 3: Cross multiply
    315,422.62x = 473,131.50 × 78,763.72
  4. Step 4: Simplify right side
    315,422.62x = 37,265,596,989.18
  5. Step 5: Solve for x
    x = 37,265,596,989.18/315,422.62
  6. Step 6: Final answer
    x = 118,144.97

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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.