Home / 78,727.80-118,110.30-31,345.60

Finding the Fourth Proportional to 78,727.80, 118,110.30 and 31,345.60

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Solution

The fourth proportional to 78,727.80, 118,110.30 and 31,345.60 is: 47,025.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,727.80 : 118,110.30 = 31,345.60 : x
  2. Step 2: Convert to fraction form
    78,727.80/118,110.30 = 31,345.60/x
  3. Step 3: Cross multiply
    78,727.80x = 118,110.30 × 31,345.60
  4. Step 4: Simplify right side
    78,727.80x = 3,702,238,219.68
  5. Step 5: Solve for x
    x = 3,702,238,219.68/78,727.80
  6. Step 6: Final answer
    x = 47,025.81

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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.