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Finding the Fourth Proportional to 181,978,628.90, 272,967,943.35 and 79,941,956.90

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Solution

The fourth proportional to 181,978,628.90, 272,967,943.35 and 79,941,956.90 is: 119,912,935.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,978,628.90 : 272,967,943.35 = 79,941,956.90 : x
  2. Step 2: Convert to fraction form
    181,978,628.90/272,967,943.35 = 79,941,956.90/x
  3. Step 3: Cross multiply
    181,978,628.90x = 272,967,943.35 × 79,941,956.90
  4. Step 4: Simplify right side
    181,978,628.90x = 21,821,591,562,367,344
  5. Step 5: Solve for x
    x = 21,821,591,562,367,344/181,978,628.90
  6. Step 6: Final answer
    x = 119,912,935.35

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1.5x scale

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.