Home / 82,105,719.80-112,702,345.09-72,605,129.36

Finding the Fourth Proportional to 82,105,719.80, 112,702,345.09 and 72,605,129.36

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Solution

The fourth proportional to 82,105,719.80, 112,702,345.09 and 72,605,129.36 is: 99,661,367.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,105,719.80 : 112,702,345.09 = 72,605,129.36 : x
  2. Step 2: Convert to fraction form
    82,105,719.80/112,702,345.09 = 72,605,129.36/x
  3. Step 3: Cross multiply
    82,105,719.80x = 112,702,345.09 × 72,605,129.36
  4. Step 4: Simplify right side
    82,105,719.80x = 8,182,768,343,689,787
  5. Step 5: Solve for x
    x = 8,182,768,343,689,787/82,105,719.80
  6. Step 6: Final answer
    x = 99,661,367.86

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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.