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Finding the Fourth Proportional to 127,803.72, 191,638.26 and 67,865.79

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Solution

The fourth proportional to 127,803.72, 191,638.26 and 67,865.79 is: 101,762.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,803.72 : 191,638.26 = 67,865.79 : x
  2. Step 2: Convert to fraction form
    127,803.72/191,638.26 = 67,865.79/x
  3. Step 3: Cross multiply
    127,803.72x = 191,638.26 × 67,865.79
  4. Step 4: Simplify right side
    127,803.72x = 13,005,681,909.13
  5. Step 5: Solve for x
    x = 13,005,681,909.13/127,803.72
  6. Step 6: Final answer
    x = 101,762.94

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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.