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Finding the Fourth Proportional to 100,345.01, 138,474.51 and 55,023.39

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Solution

The fourth proportional to 100,345.01, 138,474.51 and 55,023.39 is: 75,931.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,345.01 : 138,474.51 = 55,023.39 : x
  2. Step 2: Convert to fraction form
    100,345.01/138,474.51 = 55,023.39/x
  3. Step 3: Cross multiply
    100,345.01x = 138,474.51 × 55,023.39
  4. Step 4: Simplify right side
    100,345.01x = 7,619,336,276.42
  5. Step 5: Solve for x
    x = 7,619,336,276.42/100,345.01
  6. Step 6: Final answer
    x = 75,931.39

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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.