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Finding the Fourth Proportional to 129,750.40, 194,491.20 and 70,460.80

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Solution

The fourth proportional to 129,750.40, 194,491.20 and 70,460.80 is: 105,618.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,750.40 : 194,491.20 = 70,460.80 : x
  2. Step 2: Convert to fraction form
    129,750.40/194,491.20 = 70,460.80/x
  3. Step 3: Cross multiply
    129,750.40x = 194,491.20 × 70,460.80
  4. Step 4: Simplify right side
    129,750.40x = 13,704,005,544.96
  5. Step 5: Solve for x
    x = 13,704,005,544.96/129,750.40
  6. Step 6: Final answer
    x = 105,618.21

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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.