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Finding the Fourth Proportional to 72,428.70, 101,469.30 and 72,428.70

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Solution

The fourth proportional to 72,428.70, 101,469.30 and 72,428.70 is: 101,469.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,428.70 : 101,469.30 = 72,428.70 : x
  2. Step 2: Convert to fraction form
    72,428.70/101,469.30 = 72,428.70/x
  3. Step 3: Cross multiply
    72,428.70x = 101,469.30 × 72,428.70
  4. Step 4: Simplify right side
    72,428.70x = 7,349,289,488.91
  5. Step 5: Solve for x
    x = 7,349,289,488.91/72,428.70
  6. Step 6: Final answer
    x = 101,469.30

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.