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Finding the Fourth Proportional to 208,161.78, 287,263.20 and 112,669.26

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Solution

The fourth proportional to 208,161.78, 287,263.20 and 112,669.26 is: 155,483.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,161.78 : 287,263.20 = 112,669.26 : x
  2. Step 2: Convert to fraction form
    208,161.78/287,263.20 = 112,669.26/x
  3. Step 3: Cross multiply
    208,161.78x = 287,263.20 × 112,669.26
  4. Step 4: Simplify right side
    208,161.78x = 32,365,732,169.23
  5. Step 5: Solve for x
    x = 32,365,732,169.23/208,161.78
  6. Step 6: Final answer
    x = 155,483.55

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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.