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Finding the Fourth Proportional to 261,889.92, 393,030.72 and 101,990.88

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Solution

The fourth proportional to 261,889.92, 393,030.72 and 101,990.88 is: 153,062.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,889.92 : 393,030.72 = 101,990.88 : x
  2. Step 2: Convert to fraction form
    261,889.92/393,030.72 = 101,990.88/x
  3. Step 3: Cross multiply
    261,889.92x = 393,030.72 × 101,990.88
  4. Step 4: Simplify right side
    261,889.92x = 40,085,548,999.83
  5. Step 5: Solve for x
    x = 40,085,548,999.83/261,889.92
  6. Step 6: Final answer
    x = 153,062.59

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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.