Home / 216,101.21-298,258.70-128,891.90

Finding the Fourth Proportional to 216,101.21, 298,258.70 and 128,891.90

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Solution

The fourth proportional to 216,101.21, 298,258.70 and 128,891.90 is: 177,894.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,101.21 : 298,258.70 = 128,891.90 : x
  2. Step 2: Convert to fraction form
    216,101.21/298,258.70 = 128,891.90/x
  3. Step 3: Cross multiply
    216,101.21x = 298,258.70 × 128,891.90
  4. Step 4: Simplify right side
    216,101.21x = 38,443,130,635.72
  5. Step 5: Solve for x
    x = 38,443,130,635.72/216,101.21
  6. Step 6: Final answer
    x = 177,894.11

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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.