Home / 387,885.51-581,828.97-121,666.66

Finding the Fourth Proportional to 387,885.51, 581,828.97 and 121,666.66

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Solution

The fourth proportional to 387,885.51, 581,828.97 and 121,666.66 is: 182,500.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,885.51 : 581,828.97 = 121,666.66 : x
  2. Step 2: Convert to fraction form
    387,885.51/581,828.97 = 121,666.66/x
  3. Step 3: Cross multiply
    387,885.51x = 581,828.97 × 121,666.66
  4. Step 4: Simplify right side
    387,885.51x = 70,789,186,472.82
  5. Step 5: Solve for x
    x = 70,789,186,472.82/387,885.51
  6. Step 6: Final answer
    x = 182,500.21

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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.