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Finding the Fourth Proportional to 129,390.40, 194,020.80 and 59,190.40

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Solution

The fourth proportional to 129,390.40, 194,020.80 and 59,190.40 is: 88,755.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,390.40 : 194,020.80 = 59,190.40 : x
  2. Step 2: Convert to fraction form
    129,390.40/194,020.80 = 59,190.40/x
  3. Step 3: Cross multiply
    129,390.40x = 194,020.80 × 59,190.40
  4. Step 4: Simplify right side
    129,390.40x = 11,484,168,760.32
  5. Step 5: Solve for x
    x = 11,484,168,760.32/129,390.40
  6. Step 6: Final answer
    x = 88,755.96

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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.