Home / 218,910.30-328,365.45-78,683.10

Finding the Fourth Proportional to 218,910.30, 328,365.45 and 78,683.10

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Solution

The fourth proportional to 218,910.30, 328,365.45 and 78,683.10 is: 118,024.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,910.30 : 328,365.45 = 78,683.10 : x
  2. Step 2: Convert to fraction form
    218,910.30/328,365.45 = 78,683.10/x
  3. Step 3: Cross multiply
    218,910.30x = 328,365.45 × 78,683.10
  4. Step 4: Simplify right side
    218,910.30x = 25,836,811,538.90
  5. Step 5: Solve for x
    x = 25,836,811,538.90/218,910.30
  6. Step 6: Final answer
    x = 118,024.65

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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.