Home / 99,137.95-136,284.32-85,289.69

Finding the Fourth Proportional to 99,137.95, 136,284.32 and 85,289.69

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Solution

The fourth proportional to 99,137.95, 136,284.32 and 85,289.69 is: 117,247.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,137.95 : 136,284.32 = 85,289.69 : x
  2. Step 2: Convert to fraction form
    99,137.95/136,284.32 = 85,289.69/x
  3. Step 3: Cross multiply
    99,137.95x = 136,284.32 × 85,289.69
  4. Step 4: Simplify right side
    99,137.95x = 11,623,647,574.46
  5. Step 5: Solve for x
    x = 11,623,647,574.46/99,137.95
  6. Step 6: Final answer
    x = 117,247.20

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.