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Finding the Fourth Proportional to 100,713.34, 138,990.63 and 56,001.34

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Solution

The fourth proportional to 100,713.34, 138,990.63 and 56,001.34 is: 77,285.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,713.34 : 138,990.63 = 56,001.34 : x
  2. Step 2: Convert to fraction form
    100,713.34/138,990.63 = 56,001.34/x
  3. Step 3: Cross multiply
    100,713.34x = 138,990.63 × 56,001.34
  4. Step 4: Simplify right side
    100,713.34x = 7,783,661,527.44
  5. Step 5: Solve for x
    x = 7,783,661,527.44/100,713.34
  6. Step 6: Final answer
    x = 77,285.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.