Home / 131,651.21-181,678.11-71,221.71

Finding the Fourth Proportional to 131,651.21, 181,678.11 and 71,221.71

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Solution

The fourth proportional to 131,651.21, 181,678.11 and 71,221.71 is: 98,285.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,651.21 : 181,678.11 = 71,221.71 : x
  2. Step 2: Convert to fraction form
    131,651.21/181,678.11 = 71,221.71/x
  3. Step 3: Cross multiply
    131,651.21x = 181,678.11 × 71,221.71
  4. Step 4: Simplify right side
    131,651.21x = 12,939,425,663.77
  5. Step 5: Solve for x
    x = 12,939,425,663.77/131,651.21
  6. Step 6: Final answer
    x = 98,285.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.