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Finding the Fourth Proportional to 239,534.80, 359,431.80 and 99,307.60

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Solution

The fourth proportional to 239,534.80, 359,431.80 and 99,307.60 is: 149,015.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,534.80 : 359,431.80 = 99,307.60 : x
  2. Step 2: Convert to fraction form
    239,534.80/359,431.80 = 99,307.60/x
  3. Step 3: Cross multiply
    239,534.80x = 359,431.80 × 99,307.60
  4. Step 4: Simplify right side
    239,534.80x = 35,694,309,421.68
  5. Step 5: Solve for x
    x = 35,694,309,421.68/239,534.80
  6. Step 6: Final answer
    x = 149,015.13

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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.