Home / 84,009,901.20-126,014,851.80-76,829,542.80

Finding the Fourth Proportional to 84,009,901.20, 126,014,851.80 and 76,829,542.80

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Solution

The fourth proportional to 84,009,901.20, 126,014,851.80 and 76,829,542.80 is: 115,244,314.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,009,901.20 : 126,014,851.80 = 76,829,542.80 : x
  2. Step 2: Convert to fraction form
    84,009,901.20/126,014,851.80 = 76,829,542.80/x
  3. Step 3: Cross multiply
    84,009,901.20x = 126,014,851.80 × 76,829,542.80
  4. Step 4: Simplify right side
    84,009,901.20x = 9,681,663,449,803,756
  5. Step 5: Solve for x
    x = 9,681,663,449,803,756/84,009,901.20
  6. Step 6: Final answer
    x = 115,244,314.20

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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.