Home / 218,117.77-300,999.33-121,320.61

Finding the Fourth Proportional to 218,117.77, 300,999.33 and 121,320.61

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Solution

The fourth proportional to 218,117.77, 300,999.33 and 121,320.61 is: 167,420.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,117.77 : 300,999.33 = 121,320.61 : x
  2. Step 2: Convert to fraction form
    218,117.77/300,999.33 = 121,320.61/x
  3. Step 3: Cross multiply
    218,117.77x = 300,999.33 × 121,320.61
  4. Step 4: Simplify right side
    218,117.77x = 36,517,421,572.69
  5. Step 5: Solve for x
    x = 36,517,421,572.69/218,117.77
  6. Step 6: Final answer
    x = 167,420.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.