Home / 208,543.77-312,859.40-90,231.93

Finding the Fourth Proportional to 208,543.77, 312,859.40 and 90,231.93

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Solution

The fourth proportional to 208,543.77, 312,859.40 and 90,231.93 is: 135,366.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,543.77 : 312,859.40 = 90,231.93 : x
  2. Step 2: Convert to fraction form
    208,543.77/312,859.40 = 90,231.93/x
  3. Step 3: Cross multiply
    208,543.77x = 312,859.40 × 90,231.93
  4. Step 4: Simplify right side
    208,543.77x = 28,229,907,480.64
  5. Step 5: Solve for x
    x = 28,229,907,480.64/208,543.77
  6. Step 6: Final answer
    x = 135,366.82

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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.