Home / 129,417.12-194,172.40-45,189.70

Finding the Fourth Proportional to 129,417.12, 194,172.40 and 45,189.70

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Solution

The fourth proportional to 129,417.12, 194,172.40 and 45,189.70 is: 67,800.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,417.12 : 194,172.40 = 45,189.70 : x
  2. Step 2: Convert to fraction form
    129,417.12/194,172.40 = 45,189.70/x
  3. Step 3: Cross multiply
    129,417.12x = 194,172.40 × 45,189.70
  4. Step 4: Simplify right side
    129,417.12x = 8,774,592,504.28
  5. Step 5: Solve for x
    x = 8,774,592,504.28/129,417.12
  6. Step 6: Final answer
    x = 67,800.86

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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.