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Finding the Fourth Proportional to 136,657.58, 188,675.26 and 85,740.17

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Solution

The fourth proportional to 136,657.58, 188,675.26 and 85,740.17 is: 118,376.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,657.58 : 188,675.26 = 85,740.17 : x
  2. Step 2: Convert to fraction form
    136,657.58/188,675.26 = 85,740.17/x
  3. Step 3: Cross multiply
    136,657.58x = 188,675.26 × 85,740.17
  4. Step 4: Simplify right side
    136,657.58x = 16,177,047,709.47
  5. Step 5: Solve for x
    x = 16,177,047,709.47/136,657.58
  6. Step 6: Final answer
    x = 118,376.52

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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.