Home / 130,021.40-195,053.70-51,138.20

Finding the Fourth Proportional to 130,021.40, 195,053.70 and 51,138.20

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Solution

The fourth proportional to 130,021.40, 195,053.70 and 51,138.20 is: 76,715.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,021.40 : 195,053.70 = 51,138.20 : x
  2. Step 2: Convert to fraction form
    130,021.40/195,053.70 = 51,138.20/x
  3. Step 3: Cross multiply
    130,021.40x = 195,053.70 × 51,138.20
  4. Step 4: Simplify right side
    130,021.40x = 9,974,695,121.34
  5. Step 5: Solve for x
    x = 9,974,695,121.34/130,021.40
  6. Step 6: Final answer
    x = 76,715.80

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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.