Home / 84,985,721.20-127,667,538.60-81,773,455.60

Finding the Fourth Proportional to 84,985,721.20, 127,667,538.60 and 81,773,455.60

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Solution

The fourth proportional to 84,985,721.20, 127,667,538.60 and 81,773,455.60 is: 122,841,998.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,985,721.20 : 127,667,538.60 = 81,773,455.60 : x
  2. Step 2: Convert to fraction form
    84,985,721.20/127,667,538.60 = 81,773,455.60/x
  3. Step 3: Cross multiply
    84,985,721.20x = 127,667,538.60 × 81,773,455.60
  4. Step 4: Simplify right side
    84,985,721.20x = 10,439,815,799,268,384
  5. Step 5: Solve for x
    x = 10,439,815,799,268,384/84,985,721.20
  6. Step 6: Final answer
    x = 122,841,998.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.