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Finding the Fourth Proportional to 216,990, 325,485.06 and 104,649.30

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Solution

The fourth proportional to 216,990, 325,485.06 and 104,649.30 is: 156,973.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,990 : 325,485.06 = 104,649.30 : x
  2. Step 2: Convert to fraction form
    216,990/325,485.06 = 104,649.30/x
  3. Step 3: Cross multiply
    216,990x = 325,485.06 × 104,649.30
  4. Step 4: Simplify right side
    216,990x = 34,061,783,689.46
  5. Step 5: Solve for x
    x = 34,061,783,689.46/216,990
  6. Step 6: Final answer
    x = 156,973.98

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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.