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Finding the Fourth Proportional to 78,896.40, 118,238.84 and 38,854.32

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Solution

The fourth proportional to 78,896.40, 118,238.84 and 38,854.32 is: 58,229.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,896.40 : 118,238.84 = 38,854.32 : x
  2. Step 2: Convert to fraction form
    78,896.40/118,238.84 = 38,854.32/x
  3. Step 3: Cross multiply
    78,896.40x = 118,238.84 × 38,854.32
  4. Step 4: Simplify right side
    78,896.40x = 4,594,089,725.79
  5. Step 5: Solve for x
    x = 4,594,089,725.79/78,896.40
  6. Step 6: Final answer
    x = 58,229.40

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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.