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Finding the Fourth Proportional to 387,920.34, 581,902.38 and 121,674.96

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Solution

The fourth proportional to 387,920.34, 581,902.38 and 121,674.96 is: 182,519.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,920.34 : 581,902.38 = 121,674.96 : x
  2. Step 2: Convert to fraction form
    387,920.34/581,902.38 = 121,674.96/x
  3. Step 3: Cross multiply
    387,920.34x = 581,902.38 × 121,674.96
  4. Step 4: Simplify right side
    387,920.34x = 70,802,948,810.40
  5. Step 5: Solve for x
    x = 70,802,948,810.40/387,920.34
  6. Step 6: Final answer
    x = 182,519.30

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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.