Home / 387,868.81-581,618.29-135,118.21

Finding the Fourth Proportional to 387,868.81, 581,618.29 and 135,118.21

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Solution

The fourth proportional to 387,868.81, 581,618.29 and 135,118.21 is: 202,612.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,868.81 : 581,618.29 = 135,118.21 : x
  2. Step 2: Convert to fraction form
    387,868.81/581,618.29 = 135,118.21/x
  3. Step 3: Cross multiply
    387,868.81x = 581,618.29 × 135,118.21
  4. Step 4: Simplify right side
    387,868.81x = 78,587,220,962.91
  5. Step 5: Solve for x
    x = 78,587,220,962.91/387,868.81
  6. Step 6: Final answer
    x = 202,612.89

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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.