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Finding the Fourth Proportional to 82,790.78, 124,154.84 and 35,403.90

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Solution

The fourth proportional to 82,790.78, 124,154.84 and 35,403.90 is: 53,092.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,790.78 : 124,154.84 = 35,403.90 : x
  2. Step 2: Convert to fraction form
    82,790.78/124,154.84 = 35,403.90/x
  3. Step 3: Cross multiply
    82,790.78x = 124,154.84 × 35,403.90
  4. Step 4: Simplify right side
    82,790.78x = 4,395,565,539.88
  5. Step 5: Solve for x
    x = 4,395,565,539.88/82,790.78
  6. Step 6: Final answer
    x = 53,092.45

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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.