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Finding the Fourth Proportional to 78,785.60, 118,178.40 and 53,902.40

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Solution

The fourth proportional to 78,785.60, 118,178.40 and 53,902.40 is: 80,853.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,785.60 : 118,178.40 = 53,902.40 : x
  2. Step 2: Convert to fraction form
    78,785.60/118,178.40 = 53,902.40/x
  3. Step 3: Cross multiply
    78,785.60x = 118,178.40 × 53,902.40
  4. Step 4: Simplify right side
    78,785.60x = 6,370,099,388.16
  5. Step 5: Solve for x
    x = 6,370,099,388.16/78,785.60
  6. Step 6: Final answer
    x = 80,853.60

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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.