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Finding the Fourth Proportional to 136,411.61, 188,367.12 and 85,512.07

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Solution

The fourth proportional to 136,411.61, 188,367.12 and 85,512.07 is: 118,081.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,411.61 : 188,367.12 = 85,512.07 : x
  2. Step 2: Convert to fraction form
    136,411.61/188,367.12 = 85,512.07/x
  3. Step 3: Cross multiply
    136,411.61x = 188,367.12 × 85,512.07
  4. Step 4: Simplify right side
    136,411.61x = 16,107,661,880.22
  5. Step 5: Solve for x
    x = 16,107,661,880.22/136,411.61
  6. Step 6: Final answer
    x = 118,081.31

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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.