Home / 81,159.69-121,746.44-21,196.11

Finding the Fourth Proportional to 81,159.69, 121,746.44 and 21,196.11

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Solution

The fourth proportional to 81,159.69, 121,746.44 and 21,196.11 is: 31,795.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,159.69 : 121,746.44 = 21,196.11 : x
  2. Step 2: Convert to fraction form
    81,159.69/121,746.44 = 21,196.11/x
  3. Step 3: Cross multiply
    81,159.69x = 121,746.44 × 21,196.11
  4. Step 4: Simplify right side
    81,159.69x = 2,580,550,934.35
  5. Step 5: Solve for x
    x = 2,580,550,934.35/81,159.69
  6. Step 6: Final answer
    x = 31,795.97

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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.