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Finding the Fourth Proportional to 127,967.23, 191,950.80 and 68,721.40

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Solution

The fourth proportional to 127,967.23, 191,950.80 and 68,721.40 is: 103,082.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,967.23 : 191,950.80 = 68,721.40 : x
  2. Step 2: Convert to fraction form
    127,967.23/191,950.80 = 68,721.40/x
  3. Step 3: Cross multiply
    127,967.23x = 191,950.80 × 68,721.40
  4. Step 4: Simplify right side
    127,967.23x = 13,191,127,707.12
  5. Step 5: Solve for x
    x = 13,191,127,707.12/127,967.23
  6. Step 6: Final answer
    x = 103,082.08

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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.