Home / 82,105,719.75-112,702,345.11-72,605,129.31

Finding the Fourth Proportional to 82,105,719.75, 112,702,345.11 and 72,605,129.31

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Solution

The fourth proportional to 82,105,719.75, 112,702,345.11 and 72,605,129.31 is: 99,661,367.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,105,719.75 : 112,702,345.11 = 72,605,129.31 : x
  2. Step 2: Convert to fraction form
    82,105,719.75/112,702,345.11 = 72,605,129.31/x
  3. Step 3: Cross multiply
    82,105,719.75x = 112,702,345.11 × 72,605,129.31
  4. Step 4: Simplify right side
    82,105,719.75x = 8,182,768,340,251,796
  5. Step 5: Solve for x
    x = 8,182,768,340,251,796/82,105,719.75
  6. Step 6: Final answer
    x = 99,661,367.87

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.