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Finding the Fourth Proportional to 112,807.92, 155,671.56 and 61,820.04

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Solution

The fourth proportional to 112,807.92, 155,671.56 and 61,820.04 is: 85,309.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,807.92 : 155,671.56 = 61,820.04 : x
  2. Step 2: Convert to fraction form
    112,807.92/155,671.56 = 61,820.04/x
  3. Step 3: Cross multiply
    112,807.92x = 155,671.56 × 61,820.04
  4. Step 4: Simplify right side
    112,807.92x = 9,623,622,066.06
  5. Step 5: Solve for x
    x = 9,623,622,066.06/112,807.92
  6. Step 6: Final answer
    x = 85,309.81

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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.