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Finding the Fourth Proportional to 71,902.80, 107,854.20 and 47,019.60

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Solution

The fourth proportional to 71,902.80, 107,854.20 and 47,019.60 is: 70,529.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,902.80 : 107,854.20 = 47,019.60 : x
  2. Step 2: Convert to fraction form
    71,902.80/107,854.20 = 47,019.60/x
  3. Step 3: Cross multiply
    71,902.80x = 107,854.20 × 47,019.60
  4. Step 4: Simplify right side
    71,902.80x = 5,071,261,342.32
  5. Step 5: Solve for x
    x = 5,071,261,342.32/71,902.80
  6. Step 6: Final answer
    x = 70,529.40

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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.