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Finding the Fourth Proportional to 387,405.88, 581,121.93 and 103,096.71

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Solution

The fourth proportional to 387,405.88, 581,121.93 and 103,096.71 is: 154,648.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,405.88 : 581,121.93 = 103,096.71 : x
  2. Step 2: Convert to fraction form
    387,405.88/581,121.93 = 103,096.71/x
  3. Step 3: Cross multiply
    387,405.88x = 581,121.93 × 103,096.71
  4. Step 4: Simplify right side
    387,405.88x = 59,911,759,091.85
  5. Step 5: Solve for x
    x = 59,911,759,091.85/387,405.88
  6. Step 6: Final answer
    x = 154,648.55

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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.