Home / 81,566,216.79-122,346,006.81-20,153,828.89

Finding the Fourth Proportional to 81,566,216.79, 122,346,006.81 and 20,153,828.89

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Solution

The fourth proportional to 81,566,216.79, 122,346,006.81 and 20,153,828.89 is: 30,229,923.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,566,216.79 : 122,346,006.81 = 20,153,828.89 : x
  2. Step 2: Convert to fraction form
    81,566,216.79/122,346,006.81 = 20,153,828.89/x
  3. Step 3: Cross multiply
    81,566,216.79x = 122,346,006.81 × 20,153,828.89
  4. Step 4: Simplify right side
    81,566,216.79x = 2,465,740,486,623,515
  5. Step 5: Solve for x
    x = 2,465,740,486,623,515/81,566,216.79
  6. Step 6: Final answer
    x = 30,229,923.41

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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.