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Finding the Fourth Proportional to 124,788.62, 172,284.62 and 81,222.77

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Solution

The fourth proportional to 124,788.62, 172,284.62 and 81,222.77 is: 112,137.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,788.62 : 172,284.62 = 81,222.77 : x
  2. Step 2: Convert to fraction form
    124,788.62/172,284.62 = 81,222.77/x
  3. Step 3: Cross multiply
    124,788.62x = 172,284.62 × 81,222.77
  4. Step 4: Simplify right side
    124,788.62x = 13,993,432,797.26
  5. Step 5: Solve for x
    x = 13,993,432,797.26/124,788.62
  6. Step 6: Final answer
    x = 112,137.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.