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Finding the Fourth Proportional to 70,658.88, 106,009.52 and 28,517.28

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Solution

The fourth proportional to 70,658.88, 106,009.52 and 28,517.28 is: 42,784.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,658.88 : 106,009.52 = 28,517.28 : x
  2. Step 2: Convert to fraction form
    70,658.88/106,009.52 = 28,517.28/x
  3. Step 3: Cross multiply
    70,658.88x = 106,009.52 × 28,517.28
  4. Step 4: Simplify right side
    70,658.88x = 3,023,103,164.51
  5. Step 5: Solve for x
    x = 3,023,103,164.51/70,658.88
  6. Step 6: Final answer
    x = 42,784.48

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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.