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Finding the Fourth Proportional to 28,734,353.40, 43,101,530.10 and 20,125,009.20

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Solution

The fourth proportional to 28,734,353.40, 43,101,530.10 and 20,125,009.20 is: 30,187,513.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,734,353.40 : 43,101,530.10 = 20,125,009.20 : x
  2. Step 2: Convert to fraction form
    28,734,353.40/43,101,530.10 = 20,125,009.20/x
  3. Step 3: Cross multiply
    28,734,353.40x = 43,101,530.10 × 20,125,009.20
  4. Step 4: Simplify right side
    28,734,353.40x = 867,418,689,796,576.88
  5. Step 5: Solve for x
    x = 867,418,689,796,576.88/28,734,353.40
  6. Step 6: Final answer
    x = 30,187,513.80

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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.