Home / 387,788.95-581,738.10-121,521.70

Finding the Fourth Proportional to 387,788.95, 581,738.10 and 121,521.70

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Solution

The fourth proportional to 387,788.95, 581,738.10 and 121,521.70 is: 182,299.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,788.95 : 581,738.10 = 121,521.70 : x
  2. Step 2: Convert to fraction form
    387,788.95/581,738.10 = 121,521.70/x
  3. Step 3: Cross multiply
    387,788.95x = 581,738.10 × 121,521.70
  4. Step 4: Simplify right side
    387,788.95x = 70,693,802,866.77
  5. Step 5: Solve for x
    x = 70,693,802,866.77/387,788.95
  6. Step 6: Final answer
    x = 182,299.68

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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.