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Finding the Fourth Proportional to 100,041.57, 138,060.64 and 54,719.55

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Solution

The fourth proportional to 100,041.57, 138,060.64 and 54,719.55 is: 75,514.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,041.57 : 138,060.64 = 54,719.55 : x
  2. Step 2: Convert to fraction form
    100,041.57/138,060.64 = 54,719.55/x
  3. Step 3: Cross multiply
    100,041.57x = 138,060.64 × 54,719.55
  4. Step 4: Simplify right side
    100,041.57x = 7,554,616,093.51
  5. Step 5: Solve for x
    x = 7,554,616,093.51/100,041.57
  6. Step 6: Final answer
    x = 75,514.77

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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.