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Finding the Fourth Proportional to 208,039.86, 287,003.66 and 121,955.22

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Solution

The fourth proportional to 208,039.86, 287,003.66 and 121,955.22 is: 168,244.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,039.86 : 287,003.66 = 121,955.22 : x
  2. Step 2: Convert to fraction form
    208,039.86/287,003.66 = 121,955.22/x
  3. Step 3: Cross multiply
    208,039.86x = 287,003.66 × 121,955.22
  4. Step 4: Simplify right side
    208,039.86x = 35,001,593,886.33
  5. Step 5: Solve for x
    x = 35,001,593,886.33/208,039.86
  6. Step 6: Final answer
    x = 168,244.65

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1.5x scale

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.