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Finding the Fourth Proportional to 155,719.80, 233,493.30 and 66,958.20

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Solution

The fourth proportional to 155,719.80, 233,493.30 and 66,958.20 is: 100,400.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,719.80 : 233,493.30 = 66,958.20 : x
  2. Step 2: Convert to fraction form
    155,719.80/233,493.30 = 66,958.20/x
  3. Step 3: Cross multiply
    155,719.80x = 233,493.30 × 66,958.20
  4. Step 4: Simplify right side
    155,719.80x = 15,634,291,080.06
  5. Step 5: Solve for x
    x = 15,634,291,080.06/155,719.80
  6. Step 6: Final answer
    x = 100,400.15

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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.