Home / 121,162,515.20-181,743,772.80-72,789,574.40

Finding the Fourth Proportional to 121,162,515.20, 181,743,772.80 and 72,789,574.40

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Solution

The fourth proportional to 121,162,515.20, 181,743,772.80 and 72,789,574.40 is: 109,184,361.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,162,515.20 : 181,743,772.80 = 72,789,574.40 : x
  2. Step 2: Convert to fraction form
    121,162,515.20/181,743,772.80 = 72,789,574.40/x
  3. Step 3: Cross multiply
    121,162,515.20x = 181,743,772.80 × 72,789,574.40
  4. Step 4: Simplify right side
    121,162,515.20x = 13,229,051,871,962,298
  5. Step 5: Solve for x
    x = 13,229,051,871,962,298/121,162,515.20
  6. Step 6: Final answer
    x = 109,184,361.60

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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.