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Finding the Fourth Proportional to 100,050.62, 138,064.70 and 54,719.78

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Solution

The fourth proportional to 100,050.62, 138,064.70 and 54,719.78 is: 75,510.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,050.62 : 138,064.70 = 54,719.78 : x
  2. Step 2: Convert to fraction form
    100,050.62/138,064.70 = 54,719.78/x
  3. Step 3: Cross multiply
    100,050.62x = 138,064.70 × 54,719.78
  4. Step 4: Simplify right side
    100,050.62x = 7,554,870,009.77
  5. Step 5: Solve for x
    x = 7,554,870,009.77/100,050.62
  6. Step 6: Final answer
    x = 75,510.48

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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.