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Finding the Fourth Proportional to 104,978.40, 157,467.60 and 99,292.20

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Solution

The fourth proportional to 104,978.40, 157,467.60 and 99,292.20 is: 148,938.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,978.40 : 157,467.60 = 99,292.20 : x
  2. Step 2: Convert to fraction form
    104,978.40/157,467.60 = 99,292.20/x
  3. Step 3: Cross multiply
    104,978.40x = 157,467.60 × 99,292.20
  4. Step 4: Simplify right side
    104,978.40x = 15,635,304,432.72
  5. Step 5: Solve for x
    x = 15,635,304,432.72/104,978.40
  6. Step 6: Final answer
    x = 148,938.30

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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.