Home / 206,864.40-310,588.20-128,132.40

Finding the Fourth Proportional to 206,864.40, 310,588.20 and 128,132.40

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Solution

The fourth proportional to 206,864.40, 310,588.20 and 128,132.40 is: 192,379.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,864.40 : 310,588.20 = 128,132.40 : x
  2. Step 2: Convert to fraction form
    206,864.40/310,588.20 = 128,132.40/x
  3. Step 3: Cross multiply
    206,864.40x = 310,588.20 × 128,132.40
  4. Step 4: Simplify right side
    206,864.40x = 39,796,411,477.68
  5. Step 5: Solve for x
    x = 39,796,411,477.68/206,864.40
  6. Step 6: Final answer
    x = 192,379.22

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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.