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Finding the Fourth Proportional to 216,465.60, 298,761.04 and 129,256.32

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Solution

The fourth proportional to 216,465.60, 298,761.04 and 129,256.32 is: 178,396.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,465.60 : 298,761.04 = 129,256.32 : x
  2. Step 2: Convert to fraction form
    216,465.60/298,761.04 = 129,256.32/x
  3. Step 3: Cross multiply
    216,465.60x = 298,761.04 × 129,256.32
  4. Step 4: Simplify right side
    216,465.60x = 38,616,752,589.77
  5. Step 5: Solve for x
    x = 38,616,752,589.77/216,465.60
  6. Step 6: Final answer
    x = 178,396.72

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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.