Home / 102,990.24-154,485.36-66,287.52

Finding the Fourth Proportional to 102,990.24, 154,485.36 and 66,287.52

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Solution

The fourth proportional to 102,990.24, 154,485.36 and 66,287.52 is: 99,431.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,990.24 : 154,485.36 = 66,287.52 : x
  2. Step 2: Convert to fraction form
    102,990.24/154,485.36 = 66,287.52/x
  3. Step 3: Cross multiply
    102,990.24x = 154,485.36 × 66,287.52
  4. Step 4: Simplify right side
    102,990.24x = 10,240,451,390.71
  5. Step 5: Solve for x
    x = 10,240,451,390.71/102,990.24
  6. Step 6: Final answer
    x = 99,431.28

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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.