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Finding the Fourth Proportional to 112,646.43, 155,449.73 and 61,658.01

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Solution

The fourth proportional to 112,646.43, 155,449.73 and 61,658.01 is: 85,086.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,646.43 : 155,449.73 = 61,658.01 : x
  2. Step 2: Convert to fraction form
    112,646.43/155,449.73 = 61,658.01/x
  3. Step 3: Cross multiply
    112,646.43x = 155,449.73 × 61,658.01
  4. Step 4: Simplify right side
    112,646.43x = 9,584,721,160.98
  5. Step 5: Solve for x
    x = 9,584,721,160.98/112,646.43
  6. Step 6: Final answer
    x = 85,086.77

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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.