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Finding the Fourth Proportional to 63,683.93, 87,856.55 and 39,769.09

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Solution

The fourth proportional to 63,683.93, 87,856.55 and 39,769.09 is: 54,864.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,683.93 : 87,856.55 = 39,769.09 : x
  2. Step 2: Convert to fraction form
    63,683.93/87,856.55 = 39,769.09/x
  3. Step 3: Cross multiply
    63,683.93x = 87,856.55 × 39,769.09
  4. Step 4: Simplify right side
    63,683.93x = 3,493,975,044.04
  5. Step 5: Solve for x
    x = 3,493,975,044.04/63,683.93
  6. Step 6: Final answer
    x = 54,864.31

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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.