Home / 223,989.36-309,134.52-128,477.40

Finding the Fourth Proportional to 223,989.36, 309,134.52 and 128,477.40

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Solution

The fourth proportional to 223,989.36, 309,134.52 and 128,477.40 is: 177,315.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,989.36 : 309,134.52 = 128,477.40 : x
  2. Step 2: Convert to fraction form
    223,989.36/309,134.52 = 128,477.40/x
  3. Step 3: Cross multiply
    223,989.36x = 309,134.52 × 128,477.40
  4. Step 4: Simplify right side
    223,989.36x = 39,716,799,379.85
  5. Step 5: Solve for x
    x = 39,716,799,379.85/223,989.36
  6. Step 6: Final answer
    x = 177,315.56

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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.