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Finding the Fourth Proportional to 71,272.59, 106,878.77 and 21,359.79

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Solution

The fourth proportional to 71,272.59, 106,878.77 and 21,359.79 is: 32,030.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,272.59 : 106,878.77 = 21,359.79 : x
  2. Step 2: Convert to fraction form
    71,272.59/106,878.77 = 21,359.79/x
  3. Step 3: Cross multiply
    71,272.59x = 106,878.77 × 21,359.79
  4. Step 4: Simplify right side
    71,272.59x = 2,282,907,975.86
  5. Step 5: Solve for x
    x = 2,282,907,975.86/71,272.59
  6. Step 6: Final answer
    x = 32,030.66

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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.