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Finding the Fourth Proportional to 100,019.88, 138,027.51 and 54,697.14

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Solution

The fourth proportional to 100,019.88, 138,027.51 and 54,697.14 is: 75,482.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,019.88 : 138,027.51 = 54,697.14 : x
  2. Step 2: Convert to fraction form
    100,019.88/138,027.51 = 54,697.14/x
  3. Step 3: Cross multiply
    100,019.88x = 138,027.51 × 54,697.14
  4. Step 4: Simplify right side
    100,019.88x = 7,549,710,038.32
  5. Step 5: Solve for x
    x = 7,549,710,038.32/100,019.88
  6. Step 6: Final answer
    x = 75,482.09

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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.