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Finding the Fourth Proportional to 67,456.40, 101,184.60 and 20,703.20

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Solution

The fourth proportional to 67,456.40, 101,184.60 and 20,703.20 is: 31,054.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,456.40 : 101,184.60 = 20,703.20 : x
  2. Step 2: Convert to fraction form
    67,456.40/101,184.60 = 20,703.20/x
  3. Step 3: Cross multiply
    67,456.40x = 101,184.60 × 20,703.20
  4. Step 4: Simplify right side
    67,456.40x = 2,094,845,010.72
  5. Step 5: Solve for x
    x = 2,094,845,010.72/67,456.40
  6. Step 6: Final answer
    x = 31,054.80

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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.