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Finding the Fourth Proportional to 250,420.66, 375,464.90 and 81,881.93

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Solution

The fourth proportional to 250,420.66, 375,464.90 and 81,881.93 is: 122,768.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,420.66 : 375,464.90 = 81,881.93 : x
  2. Step 2: Convert to fraction form
    250,420.66/375,464.90 = 81,881.93/x
  3. Step 3: Cross multiply
    250,420.66x = 375,464.90 × 81,881.93
  4. Step 4: Simplify right side
    250,420.66x = 30,743,791,802.62
  5. Step 5: Solve for x
    x = 30,743,791,802.62/250,420.66
  6. Step 6: Final answer
    x = 122,768.59

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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.