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Finding the Fourth Proportional to 100,000.77, 138,001.19 and 54,678.96

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Solution

The fourth proportional to 100,000.77, 138,001.19 and 54,678.96 is: 75,457.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,000.77 : 138,001.19 = 54,678.96 : x
  2. Step 2: Convert to fraction form
    100,000.77/138,001.19 = 54,678.96/x
  3. Step 3: Cross multiply
    100,000.77x = 138,001.19 × 54,678.96
  4. Step 4: Simplify right side
    100,000.77x = 7,545,760,584.56
  5. Step 5: Solve for x
    x = 7,545,760,584.56/100,000.77
  6. Step 6: Final answer
    x = 75,457.02

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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.