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Finding the Fourth Proportional to 112,796.10, 155,658.12 and 61,808.76

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Solution

The fourth proportional to 112,796.10, 155,658.12 and 61,808.76 is: 85,295.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,796.10 : 155,658.12 = 61,808.76 : x
  2. Step 2: Convert to fraction form
    112,796.10/155,658.12 = 61,808.76/x
  3. Step 3: Cross multiply
    112,796.10x = 155,658.12 × 61,808.76
  4. Step 4: Simplify right side
    112,796.10x = 9,621,035,381.13
  5. Step 5: Solve for x
    x = 9,621,035,381.13/112,796.10
  6. Step 6: Final answer
    x = 85,295.82

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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.