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Finding the Fourth Proportional to 99,129.64, 136,799.02 and 53,807.59

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Solution

The fourth proportional to 99,129.64, 136,799.02 and 53,807.59 is: 74,254.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,129.64 : 136,799.02 = 53,807.59 : x
  2. Step 2: Convert to fraction form
    99,129.64/136,799.02 = 53,807.59/x
  3. Step 3: Cross multiply
    99,129.64x = 136,799.02 × 53,807.59
  4. Step 4: Simplify right side
    99,129.64x = 7,360,825,922.56
  5. Step 5: Solve for x
    x = 7,360,825,922.56/99,129.64
  6. Step 6: Final answer
    x = 74,254.54

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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.