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Finding the Fourth Proportional to 316,388.51, 474,484.97 and 91,765.47

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Solution

The fourth proportional to 316,388.51, 474,484.97 and 91,765.47 is: 137,619.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,388.51 : 474,484.97 = 91,765.47 : x
  2. Step 2: Convert to fraction form
    316,388.51/474,484.97 = 91,765.47/x
  3. Step 3: Cross multiply
    316,388.51x = 474,484.97 × 91,765.47
  4. Step 4: Simplify right side
    316,388.51x = 43,541,335,821.16
  5. Step 5: Solve for x
    x = 43,541,335,821.16/316,388.51
  6. Step 6: Final answer
    x = 137,619.84

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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.