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Finding the Fourth Proportional to 216,420.80, 324,631.11 and 58,649.25

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Solution

The fourth proportional to 216,420.80, 324,631.11 and 58,649.25 is: 87,973.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,420.80 : 324,631.11 = 58,649.25 : x
  2. Step 2: Convert to fraction form
    216,420.80/324,631.11 = 58,649.25/x
  3. Step 3: Cross multiply
    216,420.80x = 324,631.11 × 58,649.25
  4. Step 4: Simplify right side
    216,420.80x = 19,039,371,128.17
  5. Step 5: Solve for x
    x = 19,039,371,128.17/216,420.80
  6. Step 6: Final answer
    x = 87,973.85

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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.