Home / 218,639.25-301,743.63-127,989.72

Finding the Fourth Proportional to 218,639.25, 301,743.63 and 127,989.72

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Solution

The fourth proportional to 218,639.25, 301,743.63 and 127,989.72 is: 176,638.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,639.25 : 301,743.63 = 127,989.72 : x
  2. Step 2: Convert to fraction form
    218,639.25/301,743.63 = 127,989.72/x
  3. Step 3: Cross multiply
    218,639.25x = 301,743.63 × 127,989.72
  4. Step 4: Simplify right side
    218,639.25x = 38,620,082,715.48
  5. Step 5: Solve for x
    x = 38,620,082,715.48/218,639.25
  6. Step 6: Final answer
    x = 176,638.38

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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.