Home / 80,861,971.20-121,210,288.20-39,858,345.60

Finding the Fourth Proportional to 80,861,971.20, 121,210,288.20 and 39,858,345.60

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Solution

The fourth proportional to 80,861,971.20, 121,210,288.20 and 39,858,345.60 is: 59,746,769.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,861,971.20 : 121,210,288.20 = 39,858,345.60 : x
  2. Step 2: Convert to fraction form
    80,861,971.20/121,210,288.20 = 39,858,345.60/x
  3. Step 3: Cross multiply
    80,861,971.20x = 121,210,288.20 × 39,858,345.60
  4. Step 4: Simplify right side
    80,861,971.20x = 4,831,241,557,351,202
  5. Step 5: Solve for x
    x = 4,831,241,557,351,202/80,861,971.20
  6. Step 6: Final answer
    x = 59,746,769.53

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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.