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Finding the Fourth Proportional to 208,114.38, 287,127.54 and 135,484.20

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Solution

The fourth proportional to 208,114.38, 287,127.54 and 135,484.20 is: 186,922.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,114.38 : 287,127.54 = 135,484.20 : x
  2. Step 2: Convert to fraction form
    208,114.38/287,127.54 = 135,484.20/x
  3. Step 3: Cross multiply
    208,114.38x = 287,127.54 × 135,484.20
  4. Step 4: Simplify right side
    208,114.38x = 38,901,245,054.87
  5. Step 5: Solve for x
    x = 38,901,245,054.87/208,114.38
  6. Step 6: Final answer
    x = 186,922.43

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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.