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Finding the Fourth Proportional to 136,655.08, 188,671.80 and 85,737.66

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Solution

The fourth proportional to 136,655.08, 188,671.80 and 85,737.66 is: 118,373.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,655.08 : 188,671.80 = 85,737.66 : x
  2. Step 2: Convert to fraction form
    136,655.08/188,671.80 = 85,737.66/x
  3. Step 3: Cross multiply
    136,655.08x = 188,671.80 × 85,737.66
  4. Step 4: Simplify right side
    136,655.08x = 16,176,278,639.99
  5. Step 5: Solve for x
    x = 16,176,278,639.99/136,655.08
  6. Step 6: Final answer
    x = 118,373.05

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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.