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Finding the Fourth Proportional to 109,671.20, 164,215.20 and 70,013.60

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Solution

The fourth proportional to 109,671.20, 164,215.20 and 70,013.60 is: 104,834.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,671.20 : 164,215.20 = 70,013.60 : x
  2. Step 2: Convert to fraction form
    109,671.20/164,215.20 = 70,013.60/x
  3. Step 3: Cross multiply
    109,671.20x = 164,215.20 × 70,013.60
  4. Step 4: Simplify right side
    109,671.20x = 11,497,297,326.72
  5. Step 5: Solve for x
    x = 11,497,297,326.72/109,671.20
  6. Step 6: Final answer
    x = 104,834.24

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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.