Home / 111,981.12-154,533.90-61,680.12

Finding the Fourth Proportional to 111,981.12, 154,533.90 and 61,680.12

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Solution

The fourth proportional to 111,981.12, 154,533.90 and 61,680.12 is: 85,118.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,981.12 : 154,533.90 = 61,680.12 : x
  2. Step 2: Convert to fraction form
    111,981.12/154,533.90 = 61,680.12/x
  3. Step 3: Cross multiply
    111,981.12x = 154,533.90 × 61,680.12
  4. Step 4: Simplify right side
    111,981.12x = 9,531,669,496.07
  5. Step 5: Solve for x
    x = 9,531,669,496.07/111,981.12
  6. Step 6: Final answer
    x = 85,118.54

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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.