Home / 72,769,159.89-100,420,920.72-39,729,407.94

Finding the Fourth Proportional to 72,769,159.89, 100,420,920.72 and 39,729,407.94

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Solution

The fourth proportional to 72,769,159.89, 100,420,920.72 and 39,729,407.94 is: 54,826,299.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,769,159.89 : 100,420,920.72 = 39,729,407.94 : x
  2. Step 2: Convert to fraction form
    72,769,159.89/100,420,920.72 = 39,729,407.94/x
  3. Step 3: Cross multiply
    72,769,159.89x = 100,420,920.72 × 39,729,407.94
  4. Step 4: Simplify right side
    72,769,159.89x = 3,989,663,724,995,278
  5. Step 5: Solve for x
    x = 3,989,663,724,995,278/72,769,159.89
  6. Step 6: Final answer
    x = 54,826,299.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.