Home / 112,829.11-155,705.40-61,840.75

Finding the Fourth Proportional to 112,829.11, 155,705.40 and 61,840.75

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Solution

The fourth proportional to 112,829.11, 155,705.40 and 61,840.75 is: 85,340.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,829.11 : 155,705.40 = 61,840.75 : x
  2. Step 2: Convert to fraction form
    112,829.11/155,705.40 = 61,840.75/x
  3. Step 3: Cross multiply
    112,829.11x = 155,705.40 × 61,840.75
  4. Step 4: Simplify right side
    112,829.11x = 9,628,938,715.05
  5. Step 5: Solve for x
    x = 9,628,938,715.05/112,829.11
  6. Step 6: Final answer
    x = 85,340.91

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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.