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Finding the Fourth Proportional to 423,657.90, 635,486.40 and 108,114.78

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Solution

The fourth proportional to 423,657.90, 635,486.40 and 108,114.78 is: 162,172.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,657.90 : 635,486.40 = 108,114.78 : x
  2. Step 2: Convert to fraction form
    423,657.90/635,486.40 = 108,114.78/x
  3. Step 3: Cross multiply
    423,657.90x = 635,486.40 × 108,114.78
  4. Step 4: Simplify right side
    423,657.90x = 68,705,472,328.99
  5. Step 5: Solve for x
    x = 68,705,472,328.99/423,657.90
  6. Step 6: Final answer
    x = 162,172.06

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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.