Home / 85,202,815.20-127,888,203.60-42,120,664.80

Finding the Fourth Proportional to 85,202,815.20, 127,888,203.60 and 42,120,664.80

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Solution

The fourth proportional to 85,202,815.20, 127,888,203.60 and 42,120,664.80 is: 63,222,513.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,202,815.20 : 127,888,203.60 = 42,120,664.80 : x
  2. Step 2: Convert to fraction form
    85,202,815.20/127,888,203.60 = 42,120,664.80/x
  3. Step 3: Cross multiply
    85,202,815.20x = 127,888,203.60 × 42,120,664.80
  4. Step 4: Simplify right side
    85,202,815.20x = 5,386,736,155,709,753
  5. Step 5: Solve for x
    x = 5,386,736,155,709,753/85,202,815.20
  6. Step 6: Final answer
    x = 63,222,513.75

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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.