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Finding the Fourth Proportional to 129,909.60, 194,864.40 and 82,670.40

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Solution

The fourth proportional to 129,909.60, 194,864.40 and 82,670.40 is: 124,005.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,909.60 : 194,864.40 = 82,670.40 : x
  2. Step 2: Convert to fraction form
    129,909.60/194,864.40 = 82,670.40/x
  3. Step 3: Cross multiply
    129,909.60x = 194,864.40 × 82,670.40
  4. Step 4: Simplify right side
    129,909.60x = 16,109,517,893.76
  5. Step 5: Solve for x
    x = 16,109,517,893.76/129,909.60
  6. Step 6: Final answer
    x = 124,005.60

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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.