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Finding the Fourth Proportional to 79,804,947.20, 119,707,420.80 and 43,399,270.40

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Solution

The fourth proportional to 79,804,947.20, 119,707,420.80 and 43,399,270.40 is: 65,098,905.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,804,947.20 : 119,707,420.80 = 43,399,270.40 : x
  2. Step 2: Convert to fraction form
    79,804,947.20/119,707,420.80 = 43,399,270.40/x
  3. Step 3: Cross multiply
    79,804,947.20x = 119,707,420.80 × 43,399,270.40
  4. Step 4: Simplify right side
    79,804,947.20x = 5,195,214,724,185,784
  5. Step 5: Solve for x
    x = 5,195,214,724,185,784/79,804,947.20
  6. Step 6: Final answer
    x = 65,098,905.60

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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.