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Finding the Fourth Proportional to 387,797.12, 581,678.76 and 121,551.56

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Solution

The fourth proportional to 387,797.12, 581,678.76 and 121,551.56 is: 182,322.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,797.12 : 581,678.76 = 121,551.56 : x
  2. Step 2: Convert to fraction form
    387,797.12/581,678.76 = 121,551.56/x
  3. Step 3: Cross multiply
    387,797.12x = 581,678.76 × 121,551.56
  4. Step 4: Simplify right side
    387,797.12x = 70,703,960,696.87
  5. Step 5: Solve for x
    x = 70,703,960,696.87/387,797.12
  6. Step 6: Final answer
    x = 182,322.04

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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.