Home / 136,908.10-205,325.70-42,138.10

Finding the Fourth Proportional to 136,908.10, 205,325.70 and 42,138.10

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Solution

The fourth proportional to 136,908.10, 205,325.70 and 42,138.10 is: 63,195.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,908.10 : 205,325.70 = 42,138.10 : x
  2. Step 2: Convert to fraction form
    136,908.10/205,325.70 = 42,138.10/x
  3. Step 3: Cross multiply
    136,908.10x = 205,325.70 × 42,138.10
  4. Step 4: Simplify right side
    136,908.10x = 8,652,034,879.17
  5. Step 5: Solve for x
    x = 8,652,034,879.17/136,908.10
  6. Step 6: Final answer
    x = 63,195.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.