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Finding the Fourth Proportional to 129,468.80, 194,203.20 and 76,937.60

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Solution

The fourth proportional to 129,468.80, 194,203.20 and 76,937.60 is: 115,406.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,468.80 : 194,203.20 = 76,937.60 : x
  2. Step 2: Convert to fraction form
    129,468.80/194,203.20 = 76,937.60/x
  3. Step 3: Cross multiply
    129,468.80x = 194,203.20 × 76,937.60
  4. Step 4: Simplify right side
    129,468.80x = 14,941,528,120.32
  5. Step 5: Solve for x
    x = 14,941,528,120.32/129,468.80
  6. Step 6: Final answer
    x = 115,406.40

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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.