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Finding the Fourth Proportional to 99,028, 136,659.36 and 54,316

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Solution

The fourth proportional to 99,028, 136,659.36 and 54,316 is: 74,956.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,028 : 136,659.36 = 54,316 : x
  2. Step 2: Convert to fraction form
    99,028/136,659.36 = 54,316/x
  3. Step 3: Cross multiply
    99,028x = 136,659.36 × 54,316
  4. Step 4: Simplify right side
    99,028x = 7,422,789,797.76
  5. Step 5: Solve for x
    x = 7,422,789,797.76/99,028
  6. Step 6: Final answer
    x = 74,956.47

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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.