Home / 211,287,127.80-316,930,691.70-138,727,716.60

Finding the Fourth Proportional to 211,287,127.80, 316,930,691.70 and 138,727,716.60

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Solution

The fourth proportional to 211,287,127.80, 316,930,691.70 and 138,727,716.60 is: 208,091,574.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,287,127.80 : 316,930,691.70 = 138,727,716.60 : x
  2. Step 2: Convert to fraction form
    211,287,127.80/316,930,691.70 = 138,727,716.60/x
  3. Step 3: Cross multiply
    211,287,127.80x = 316,930,691.70 × 138,727,716.60
  4. Step 4: Simplify right side
    211,287,127.80x = 43,967,071,179,999,568
  5. Step 5: Solve for x
    x = 43,967,071,179,999,568/211,287,127.80
  6. Step 6: Final answer
    x = 208,091,574.90

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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.