Home / 81,478.23-122,141.57-31,590.87

Finding the Fourth Proportional to 81,478.23, 122,141.57 and 31,590.87

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Solution

The fourth proportional to 81,478.23, 122,141.57 and 31,590.87 is: 47,356.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,478.23 : 122,141.57 = 31,590.87 : x
  2. Step 2: Convert to fraction form
    81,478.23/122,141.57 = 31,590.87/x
  3. Step 3: Cross multiply
    81,478.23x = 122,141.57 × 31,590.87
  4. Step 4: Simplify right side
    81,478.23x = 3,858,558,301.51
  5. Step 5: Solve for x
    x = 3,858,558,301.51/81,478.23
  6. Step 6: Final answer
    x = 47,356.92

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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.