Home / 387,986.10-581,979.38-107,503.35

Finding the Fourth Proportional to 387,986.10, 581,979.38 and 107,503.35

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Solution

The fourth proportional to 387,986.10, 581,979.38 and 107,503.35 is: 161,255.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,986.10 : 581,979.38 = 107,503.35 : x
  2. Step 2: Convert to fraction form
    387,986.10/581,979.38 = 107,503.35/x
  3. Step 3: Cross multiply
    387,986.10x = 581,979.38 × 107,503.35
  4. Step 4: Simplify right side
    387,986.10x = 62,564,734,139.32
  5. Step 5: Solve for x
    x = 62,564,734,139.32/387,986.10
  6. Step 6: Final answer
    x = 161,255.09

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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.