Home / 78,777.36-118,095.30-31,425.30

Finding the Fourth Proportional to 78,777.36, 118,095.30 and 31,425.30

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Solution

The fourth proportional to 78,777.36, 118,095.30 and 31,425.30 is: 47,109.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,777.36 : 118,095.30 = 31,425.30 : x
  2. Step 2: Convert to fraction form
    78,777.36/118,095.30 = 31,425.30/x
  3. Step 3: Cross multiply
    78,777.36x = 118,095.30 × 31,425.30
  4. Step 4: Simplify right side
    78,777.36x = 3,711,180,231.09
  5. Step 5: Solve for x
    x = 3,711,180,231.09/78,777.36
  6. Step 6: Final answer
    x = 47,109.73

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1.5x scale

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.