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Finding the Fourth Proportional to 208,274.84, 287,419.42 and 112,781.92

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Solution

The fourth proportional to 208,274.84, 287,419.42 and 112,781.92 is: 155,639.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,274.84 : 287,419.42 = 112,781.92 : x
  2. Step 2: Convert to fraction form
    208,274.84/287,419.42 = 112,781.92/x
  3. Step 3: Cross multiply
    208,274.84x = 287,419.42 × 112,781.92
  4. Step 4: Simplify right side
    208,274.84x = 32,415,714,032.89
  5. Step 5: Solve for x
    x = 32,415,714,032.89/208,274.84
  6. Step 6: Final answer
    x = 155,639.13

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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.