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Finding the Fourth Proportional to 101,917.20, 152,875.80 and 28,045.20

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Solution

The fourth proportional to 101,917.20, 152,875.80 and 28,045.20 is: 42,067.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,917.20 : 152,875.80 = 28,045.20 : x
  2. Step 2: Convert to fraction form
    101,917.20/152,875.80 = 28,045.20/x
  3. Step 3: Cross multiply
    101,917.20x = 152,875.80 × 28,045.20
  4. Step 4: Simplify right side
    101,917.20x = 4,287,432,386.16
  5. Step 5: Solve for x
    x = 4,287,432,386.16/101,917.20
  6. Step 6: Final answer
    x = 42,067.80

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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.