Home / 181,307.20-272,018.40-81,428.80

Finding the Fourth Proportional to 181,307.20, 272,018.40 and 81,428.80

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Solution

The fourth proportional to 181,307.20, 272,018.40 and 81,428.80 is: 122,169.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,307.20 : 272,018.40 = 81,428.80 : x
  2. Step 2: Convert to fraction form
    181,307.20/272,018.40 = 81,428.80/x
  3. Step 3: Cross multiply
    181,307.20x = 272,018.40 × 81,428.80
  4. Step 4: Simplify right side
    181,307.20x = 22,150,131,889.92
  5. Step 5: Solve for x
    x = 22,150,131,889.92/181,307.20
  6. Step 6: Final answer
    x = 122,169.07

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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.