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Finding the Fourth Proportional to 172,488.76, 258,774.64 and 72,677.50

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Solution

The fourth proportional to 172,488.76, 258,774.64 and 72,677.50 is: 109,033.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,488.76 : 258,774.64 = 72,677.50 : x
  2. Step 2: Convert to fraction form
    172,488.76/258,774.64 = 72,677.50/x
  3. Step 3: Cross multiply
    172,488.76x = 258,774.64 × 72,677.50
  4. Step 4: Simplify right side
    172,488.76x = 18,807,093,898.60
  5. Step 5: Solve for x
    x = 18,807,093,898.60/172,488.76
  6. Step 6: Final answer
    x = 109,033.74

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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.