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Finding the Fourth Proportional to 112,218.94, 154,862.67 and 61,917.94

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Solution

The fourth proportional to 112,218.94, 154,862.67 and 61,917.94 is: 85,447.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,218.94 : 154,862.67 = 61,917.94 : x
  2. Step 2: Convert to fraction form
    112,218.94/154,862.67 = 61,917.94/x
  3. Step 3: Cross multiply
    112,218.94x = 154,862.67 × 61,917.94
  4. Step 4: Simplify right side
    112,218.94x = 9,588,777,509.30
  5. Step 5: Solve for x
    x = 9,588,777,509.30/112,218.94
  6. Step 6: Final answer
    x = 85,447.05

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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.