Home / 427,123,940.60-640,685,910.90-104,007,812.60

Finding the Fourth Proportional to 427,123,940.60, 640,685,910.90 and 104,007,812.60

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Solution

The fourth proportional to 427,123,940.60, 640,685,910.90 and 104,007,812.60 is: 156,011,718.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,123,940.60 : 640,685,910.90 = 104,007,812.60 : x
  2. Step 2: Convert to fraction form
    427,123,940.60/640,685,910.90 = 104,007,812.60/x
  3. Step 3: Cross multiply
    427,123,940.60x = 640,685,910.90 × 104,007,812.60
  4. Step 4: Simplify right side
    427,123,940.60x = 66,636,340,156,347,488
  5. Step 5: Solve for x
    x = 66,636,340,156,347,488/427,123,940.60
  6. Step 6: Final answer
    x = 156,011,718.90

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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.