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Finding the Fourth Proportional to 387,404.88, 581,120.43 and 103,095.71

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Solution

The fourth proportional to 387,404.88, 581,120.43 and 103,095.71 is: 154,647.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,404.88 : 581,120.43 = 103,095.71 : x
  2. Step 2: Convert to fraction form
    387,404.88/581,120.43 = 103,095.71/x
  3. Step 3: Cross multiply
    387,404.88x = 581,120.43 × 103,095.71
  4. Step 4: Simplify right side
    387,404.88x = 59,911,020,420.75
  5. Step 5: Solve for x
    x = 59,911,020,420.75/387,404.88
  6. Step 6: Final answer
    x = 154,647.05

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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.