Home / 78,091.12-117,136.67-18,926.79

Finding the Fourth Proportional to 78,091.12, 117,136.67 and 18,926.79

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Solution

The fourth proportional to 78,091.12, 117,136.67 and 18,926.79 is: 28,390.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,091.12 : 117,136.67 = 18,926.79 : x
  2. Step 2: Convert to fraction form
    78,091.12/117,136.67 = 18,926.79/x
  3. Step 3: Cross multiply
    78,091.12x = 117,136.67 × 18,926.79
  4. Step 4: Simplify right side
    78,091.12x = 2,217,020,726.96
  5. Step 5: Solve for x
    x = 2,217,020,726.96/78,091.12
  6. Step 6: Final answer
    x = 28,390.18

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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.