Home / 78,558.12-117,778.32-47,386.08

Finding the Fourth Proportional to 78,558.12, 117,778.32 and 47,386.08

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Solution

The fourth proportional to 78,558.12, 117,778.32 and 47,386.08 is: 71,043.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,558.12 : 117,778.32 = 47,386.08 : x
  2. Step 2: Convert to fraction form
    78,558.12/117,778.32 = 47,386.08/x
  3. Step 3: Cross multiply
    78,558.12x = 117,778.32 × 47,386.08
  4. Step 4: Simplify right side
    78,558.12x = 5,581,052,893.79
  5. Step 5: Solve for x
    x = 5,581,052,893.79/78,558.12
  6. Step 6: Final answer
    x = 71,043.62

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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.