Home / 78,647.12-117,854.04-57,768.56

Finding the Fourth Proportional to 78,647.12, 117,854.04 and 57,768.56

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Solution

The fourth proportional to 78,647.12, 117,854.04 and 57,768.56 is: 86,567.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,647.12 : 117,854.04 = 57,768.56 : x
  2. Step 2: Convert to fraction form
    78,647.12/117,854.04 = 57,768.56/x
  3. Step 3: Cross multiply
    78,647.12x = 117,854.04 × 57,768.56
  4. Step 4: Simplify right side
    78,647.12x = 6,808,258,475.62
  5. Step 5: Solve for x
    x = 6,808,258,475.62/78,647.12
  6. Step 6: Final answer
    x = 86,567.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.