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Finding the Fourth Proportional to 239,792.80, 359,980.80 and 121,403.20

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Solution

The fourth proportional to 239,792.80, 359,980.80 and 121,403.20 is: 182,252.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,792.80 : 359,980.80 = 121,403.20 : x
  2. Step 2: Convert to fraction form
    239,792.80/359,980.80 = 121,403.20/x
  3. Step 3: Cross multiply
    239,792.80x = 359,980.80 × 121,403.20
  4. Step 4: Simplify right side
    239,792.80x = 43,702,821,058.56
  5. Step 5: Solve for x
    x = 43,702,821,058.56/239,792.80
  6. Step 6: Final answer
    x = 182,252.43

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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.