Home / 423,870.13-635,678.38-139,508.19

Finding the Fourth Proportional to 423,870.13, 635,678.38 and 139,508.19

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Solution

The fourth proportional to 423,870.13, 635,678.38 and 139,508.19 is: 209,220.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,870.13 : 635,678.38 = 139,508.19 : x
  2. Step 2: Convert to fraction form
    423,870.13/635,678.38 = 139,508.19/x
  3. Step 3: Cross multiply
    423,870.13x = 635,678.38 × 139,508.19
  4. Step 4: Simplify right side
    423,870.13x = 88,682,340,390.32
  5. Step 5: Solve for x
    x = 88,682,340,390.32/423,870.13
  6. Step 6: Final answer
    x = 209,220.55

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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.