Home / 130,108.78-195,064.28-90,021.20

Finding the Fourth Proportional to 130,108.78, 195,064.28 and 90,021.20

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Solution

The fourth proportional to 130,108.78, 195,064.28 and 90,021.20 is: 134,963.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,108.78 : 195,064.28 = 90,021.20 : x
  2. Step 2: Convert to fraction form
    130,108.78/195,064.28 = 90,021.20/x
  3. Step 3: Cross multiply
    130,108.78x = 195,064.28 × 90,021.20
  4. Step 4: Simplify right side
    130,108.78x = 17,559,919,770.32
  5. Step 5: Solve for x
    x = 17,559,919,770.32/130,108.78
  6. Step 6: Final answer
    x = 134,963.37

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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.