Home / 221,429.10-332,143.65-128,117.10

Finding the Fourth Proportional to 221,429.10, 332,143.65 and 128,117.10

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Solution

The fourth proportional to 221,429.10, 332,143.65 and 128,117.10 is: 192,175.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,429.10 : 332,143.65 = 128,117.10 : x
  2. Step 2: Convert to fraction form
    221,429.10/332,143.65 = 128,117.10/x
  3. Step 3: Cross multiply
    221,429.10x = 332,143.65 × 128,117.10
  4. Step 4: Simplify right side
    221,429.10x = 42,553,281,221.42
  5. Step 5: Solve for x
    x = 42,553,281,221.42/221,429.10
  6. Step 6: Final answer
    x = 192,175.65

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1.5x scale

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.