Home / 219,120.78-302,385.36-122,319

Finding the Fourth Proportional to 219,120.78, 302,385.36 and 122,319

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Solution

The fourth proportional to 219,120.78, 302,385.36 and 122,319 is: 168,799.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,120.78 : 302,385.36 = 122,319 : x
  2. Step 2: Convert to fraction form
    219,120.78/302,385.36 = 122,319/x
  3. Step 3: Cross multiply
    219,120.78x = 302,385.36 × 122,319
  4. Step 4: Simplify right side
    219,120.78x = 36,987,474,849.84
  5. Step 5: Solve for x
    x = 36,987,474,849.84/219,120.78
  6. Step 6: Final answer
    x = 168,799.49

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1.5x scale

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.