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Finding the Fourth Proportional to 63,015.60, 86,945.40 and 39,140.40

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Solution

The fourth proportional to 63,015.60, 86,945.40 and 39,140.40 is: 54,003.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,015.60 : 86,945.40 = 39,140.40 : x
  2. Step 2: Convert to fraction form
    63,015.60/86,945.40 = 39,140.40/x
  3. Step 3: Cross multiply
    63,015.60x = 86,945.40 × 39,140.40
  4. Step 4: Simplify right side
    63,015.60x = 3,403,077,734.16
  5. Step 5: Solve for x
    x = 3,403,077,734.16/63,015.60
  6. Step 6: Final answer
    x = 54,003.73

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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.