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Finding the Fourth Proportional to 216,822.40, 325,233.60 and 128,118.40

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Solution

The fourth proportional to 216,822.40, 325,233.60 and 128,118.40 is: 192,177.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,822.40 : 325,233.60 = 128,118.40 : x
  2. Step 2: Convert to fraction form
    216,822.40/325,233.60 = 128,118.40/x
  3. Step 3: Cross multiply
    216,822.40x = 325,233.60 × 128,118.40
  4. Step 4: Simplify right side
    216,822.40x = 41,668,408,458.24
  5. Step 5: Solve for x
    x = 41,668,408,458.24/216,822.40
  6. Step 6: Final answer
    x = 192,177.60

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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.