Home / 72,369.47-108,557.24-19,778.80

Finding the Fourth Proportional to 72,369.47, 108,557.24 and 19,778.80

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Solution

The fourth proportional to 72,369.47, 108,557.24 and 19,778.80 is: 29,669.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,369.47 : 108,557.24 = 19,778.80 : x
  2. Step 2: Convert to fraction form
    72,369.47/108,557.24 = 19,778.80/x
  3. Step 3: Cross multiply
    72,369.47x = 108,557.24 × 19,778.80
  4. Step 4: Simplify right side
    72,369.47x = 2,147,131,938.51
  5. Step 5: Solve for x
    x = 2,147,131,938.51/72,369.47
  6. Step 6: Final answer
    x = 29,669.03

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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.