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Finding the Fourth Proportional to 101,907.90, 153,007.65 and 72,456.30

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Solution

The fourth proportional to 101,907.90, 153,007.65 and 72,456.30 is: 108,788.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,907.90 : 153,007.65 = 72,456.30 : x
  2. Step 2: Convert to fraction form
    101,907.90/153,007.65 = 72,456.30/x
  3. Step 3: Cross multiply
    101,907.90x = 153,007.65 × 72,456.30
  4. Step 4: Simplify right side
    101,907.90x = 11,086,368,190.70
  5. Step 5: Solve for x
    x = 11,086,368,190.70/101,907.90
  6. Step 6: Final answer
    x = 108,788.11

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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.