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Finding the Fourth Proportional to 63,693.48, 87,860.74 and 39,790.92

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Solution

The fourth proportional to 63,693.48, 87,860.74 and 39,790.92 is: 54,888.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,693.48 : 87,860.74 = 39,790.92 : x
  2. Step 2: Convert to fraction form
    63,693.48/87,860.74 = 39,790.92/x
  3. Step 3: Cross multiply
    63,693.48x = 87,860.74 × 39,790.92
  4. Step 4: Simplify right side
    63,693.48x = 3,496,059,676.48
  5. Step 5: Solve for x
    x = 3,496,059,676.48/63,693.48
  6. Step 6: Final answer
    x = 54,888.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.