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Finding the Fourth Proportional to 100,019.64, 138,026.34 and 54,697.44

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Solution

The fourth proportional to 100,019.64, 138,026.34 and 54,697.44 is: 75,482.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,019.64 : 138,026.34 = 54,697.44 : x
  2. Step 2: Convert to fraction form
    100,019.64/138,026.34 = 54,697.44/x
  3. Step 3: Cross multiply
    100,019.64x = 138,026.34 × 54,697.44
  4. Step 4: Simplify right side
    100,019.64x = 7,549,687,450.57
  5. Step 5: Solve for x
    x = 7,549,687,450.57/100,019.64
  6. Step 6: Final answer
    x = 75,482.05

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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.