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Finding the Fourth Proportional to 208,145.52, 287,364.58 and 136,650.87

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Solution

The fourth proportional to 208,145.52, 287,364.58 and 136,650.87 is: 188,659.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,145.52 : 287,364.58 = 136,650.87 : x
  2. Step 2: Convert to fraction form
    208,145.52/287,364.58 = 136,650.87/x
  3. Step 3: Cross multiply
    208,145.52x = 287,364.58 × 136,650.87
  4. Step 4: Simplify right side
    208,145.52x = 39,268,619,522.56
  5. Step 5: Solve for x
    x = 39,268,619,522.56/208,145.52
  6. Step 6: Final answer
    x = 188,659.45

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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.