Home / 387,869.12-581,618.76-135,118.52

Finding the Fourth Proportional to 387,869.12, 581,618.76 and 135,118.52

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Solution

The fourth proportional to 387,869.12, 581,618.76 and 135,118.52 is: 202,613.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,869.12 : 581,618.76 = 135,118.52 : x
  2. Step 2: Convert to fraction form
    387,869.12/581,618.76 = 135,118.52/x
  3. Step 3: Cross multiply
    387,869.12x = 581,618.76 × 135,118.52
  4. Step 4: Simplify right side
    387,869.12x = 78,587,466,055.44
  5. Step 5: Solve for x
    x = 78,587,466,055.44/387,869.12
  6. Step 6: Final answer
    x = 202,613.36

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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.