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Finding the Fourth Proportional to 71,897.58, 107,862.21 and 21,981.51

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Solution

The fourth proportional to 71,897.58, 107,862.21 and 21,981.51 is: 32,977.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,897.58 : 107,862.21 = 21,981.51 : x
  2. Step 2: Convert to fraction form
    71,897.58/107,862.21 = 21,981.51/x
  3. Step 3: Cross multiply
    71,897.58x = 107,862.21 × 21,981.51
  4. Step 4: Simplify right side
    71,897.58x = 2,370,974,247.74
  5. Step 5: Solve for x
    x = 2,370,974,247.74/71,897.58
  6. Step 6: Final answer
    x = 32,977.11

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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.