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Finding the Fourth Proportional to 67,415.52, 101,090 and 20,657.12

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Solution

The fourth proportional to 67,415.52, 101,090 and 20,657.12 is: 30,975.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,415.52 : 101,090 = 20,657.12 : x
  2. Step 2: Convert to fraction form
    67,415.52/101,090 = 20,657.12/x
  3. Step 3: Cross multiply
    67,415.52x = 101,090 × 20,657.12
  4. Step 4: Simplify right side
    67,415.52x = 2,088,228,260.80
  5. Step 5: Solve for x
    x = 2,088,228,260.80/67,415.52
  6. Step 6: Final answer
    x = 30,975.48

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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.