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Finding the Fourth Proportional to 109,111.40, 163,820.70 and 67,639.40

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Solution

The fourth proportional to 109,111.40, 163,820.70 and 67,639.40 is: 101,554.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,111.40 : 163,820.70 = 67,639.40 : x
  2. Step 2: Convert to fraction form
    109,111.40/163,820.70 = 67,639.40/x
  3. Step 3: Cross multiply
    109,111.40x = 163,820.70 × 67,639.40
  4. Step 4: Simplify right side
    109,111.40x = 11,080,733,855.58
  5. Step 5: Solve for x
    x = 11,080,733,855.58/109,111.40
  6. Step 6: Final answer
    x = 101,554.32

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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.