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Finding the Fourth Proportional to 216,511.65, 325,061.97 and 121,808.47

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Solution

The fourth proportional to 216,511.65, 325,061.97 and 121,808.47 is: 182,878.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,511.65 : 325,061.97 = 121,808.47 : x
  2. Step 2: Convert to fraction form
    216,511.65/325,061.97 = 121,808.47/x
  3. Step 3: Cross multiply
    216,511.65x = 325,061.97 × 121,808.47
  4. Step 4: Simplify right side
    216,511.65x = 39,595,301,220.89
  5. Step 5: Solve for x
    x = 39,595,301,220.89/216,511.65
  6. Step 6: Final answer
    x = 182,878.39

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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.