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Finding the Fourth Proportional to 124,709.77, 172,156.14 and 79,449.82

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Solution

The fourth proportional to 124,709.77, 172,156.14 and 79,449.82 is: 109,676.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,709.77 : 172,156.14 = 79,449.82 : x
  2. Step 2: Convert to fraction form
    124,709.77/172,156.14 = 79,449.82/x
  3. Step 3: Cross multiply
    124,709.77x = 172,156.14 × 79,449.82
  4. Step 4: Simplify right side
    124,709.77x = 13,677,774,334.89
  5. Step 5: Solve for x
    x = 13,677,774,334.89/124,709.77
  6. Step 6: Final answer
    x = 109,676.85

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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.