Home / 136,995,995.88-189,081,939.54-81,272,346.36

Finding the Fourth Proportional to 136,995,995.88, 189,081,939.54 and 81,272,346.36

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Solution

The fourth proportional to 136,995,995.88, 189,081,939.54 and 81,272,346.36 is: 112,172,131.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,995,995.88 : 189,081,939.54 = 81,272,346.36 : x
  2. Step 2: Convert to fraction form
    136,995,995.88/189,081,939.54 = 81,272,346.36/x
  3. Step 3: Cross multiply
    136,995,995.88x = 189,081,939.54 × 81,272,346.36
  4. Step 4: Simplify right side
    136,995,995.88x = 15,367,132,880,715,458
  5. Step 5: Solve for x
    x = 15,367,132,880,715,458/136,995,995.88
  6. Step 6: Final answer
    x = 112,172,131.62

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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.