Home / 120,132,516.16-165,919,729.60-81,434,163.52

Finding the Fourth Proportional to 120,132,516.16, 165,919,729.60 and 81,434,163.52

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Solution

The fourth proportional to 120,132,516.16, 165,919,729.60 and 81,434,163.52 is: 112,471,917.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,132,516.16 : 165,919,729.60 = 81,434,163.52 : x
  2. Step 2: Convert to fraction form
    120,132,516.16/165,919,729.60 = 81,434,163.52/x
  3. Step 3: Cross multiply
    120,132,516.16x = 165,919,729.60 × 81,434,163.52
  4. Step 4: Simplify right side
    120,132,516.16x = 13,511,534,391,440,584
  5. Step 5: Solve for x
    x = 13,511,534,391,440,584/120,132,516.16
  6. Step 6: Final answer
    x = 112,471,917.04

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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.