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Finding the Fourth Proportional to 316,617.82, 474,951.48 and 91,981.96

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Solution

The fourth proportional to 316,617.82, 474,951.48 and 91,981.96 is: 137,980.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,617.82 : 474,951.48 = 91,981.96 : x
  2. Step 2: Convert to fraction form
    316,617.82/474,951.48 = 91,981.96/x
  3. Step 3: Cross multiply
    316,617.82x = 474,951.48 × 91,981.96
  4. Step 4: Simplify right side
    316,617.82x = 43,686,968,035.30
  5. Step 5: Solve for x
    x = 43,686,968,035.30/316,617.82
  6. Step 6: Final answer
    x = 137,980.13

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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.