Home / 80,918,683.80-121,378,025.70-71,565,322.20

Finding the Fourth Proportional to 80,918,683.80, 121,378,025.70 and 71,565,322.20

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Solution

The fourth proportional to 80,918,683.80, 121,378,025.70 and 71,565,322.20 is: 107,347,983.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,918,683.80 : 121,378,025.70 = 71,565,322.20 : x
  2. Step 2: Convert to fraction form
    80,918,683.80/121,378,025.70 = 71,565,322.20/x
  3. Step 3: Cross multiply
    80,918,683.80x = 121,378,025.70 × 71,565,322.20
  4. Step 4: Simplify right side
    80,918,683.80x = 8,686,457,517,220,381
  5. Step 5: Solve for x
    x = 8,686,457,517,220,381/80,918,683.80
  6. Step 6: Final answer
    x = 107,347,983.30

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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.