Home / 137,172,490.12-189,455,142.54-90,338,919.76

Finding the Fourth Proportional to 137,172,490.12, 189,455,142.54 and 90,338,919.76

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Solution

The fourth proportional to 137,172,490.12, 189,455,142.54 and 90,338,919.76 is: 124,771,176.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,172,490.12 : 189,455,142.54 = 90,338,919.76 : x
  2. Step 2: Convert to fraction form
    137,172,490.12/189,455,142.54 = 90,338,919.76/x
  3. Step 3: Cross multiply
    137,172,490.12x = 189,455,142.54 × 90,338,919.76
  4. Step 4: Simplify right side
    137,172,490.12x = 17,115,172,920,040,422
  5. Step 5: Solve for x
    x = 17,115,172,920,040,422/137,172,490.12
  6. Step 6: Final answer
    x = 124,771,176.09

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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.