Home / 136,728.12-188,626.56-85,705.98

Finding the Fourth Proportional to 136,728.12, 188,626.56 and 85,705.98

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Solution

The fourth proportional to 136,728.12, 188,626.56 and 85,705.98 is: 118,237.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,728.12 : 188,626.56 = 85,705.98 : x
  2. Step 2: Convert to fraction form
    136,728.12/188,626.56 = 85,705.98/x
  3. Step 3: Cross multiply
    136,728.12x = 188,626.56 × 85,705.98
  4. Step 4: Simplify right side
    136,728.12x = 16,166,424,178.83
  5. Step 5: Solve for x
    x = 16,166,424,178.83/136,728.12
  6. Step 6: Final answer
    x = 118,237.74

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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.