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Finding the Fourth Proportional to 109,297.80, 163,946.70 and 76,055.40

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Solution

The fourth proportional to 109,297.80, 163,946.70 and 76,055.40 is: 114,083.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,297.80 : 163,946.70 = 76,055.40 : x
  2. Step 2: Convert to fraction form
    109,297.80/163,946.70 = 76,055.40/x
  3. Step 3: Cross multiply
    109,297.80x = 163,946.70 × 76,055.40
  4. Step 4: Simplify right side
    109,297.80x = 12,469,031,847.18
  5. Step 5: Solve for x
    x = 12,469,031,847.18/109,297.80
  6. Step 6: Final answer
    x = 114,083.10

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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.