Home / 80,993,815.40-121,490,723.10-20,409,541.40

Finding the Fourth Proportional to 80,993,815.40, 121,490,723.10 and 20,409,541.40

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Solution

The fourth proportional to 80,993,815.40, 121,490,723.10 and 20,409,541.40 is: 30,614,312.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,993,815.40 : 121,490,723.10 = 20,409,541.40 : x
  2. Step 2: Convert to fraction form
    80,993,815.40/121,490,723.10 = 20,409,541.40/x
  3. Step 3: Cross multiply
    80,993,815.40x = 121,490,723.10 × 20,409,541.40
  4. Step 4: Simplify right side
    80,993,815.40x = 2,479,569,942,825,386
  5. Step 5: Solve for x
    x = 2,479,569,942,825,386/80,993,815.40
  6. Step 6: Final answer
    x = 30,614,312.10

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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.