Home / 81,909,939.20-122,864,908.80-73,690,318.40

Finding the Fourth Proportional to 81,909,939.20, 122,864,908.80 and 73,690,318.40

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Solution

The fourth proportional to 81,909,939.20, 122,864,908.80 and 73,690,318.40 is: 110,535,477.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,909,939.20 : 122,864,908.80 = 73,690,318.40 : x
  2. Step 2: Convert to fraction form
    81,909,939.20/122,864,908.80 = 73,690,318.40/x
  3. Step 3: Cross multiply
    81,909,939.20x = 122,864,908.80 × 73,690,318.40
  4. Step 4: Simplify right side
    81,909,939.20x = 9,053,954,249,658,962
  5. Step 5: Solve for x
    x = 9,053,954,249,658,962/81,909,939.20
  6. Step 6: Final answer
    x = 110,535,477.60

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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.