Home / 132,666.40-198,999.60-76,679.20

Finding the Fourth Proportional to 132,666.40, 198,999.60 and 76,679.20

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Solution

The fourth proportional to 132,666.40, 198,999.60 and 76,679.20 is: 115,018.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,666.40 : 198,999.60 = 76,679.20 : x
  2. Step 2: Convert to fraction form
    132,666.40/198,999.60 = 76,679.20/x
  3. Step 3: Cross multiply
    132,666.40x = 198,999.60 × 76,679.20
  4. Step 4: Simplify right side
    132,666.40x = 15,259,130,128.32
  5. Step 5: Solve for x
    x = 15,259,130,128.32/132,666.40
  6. Step 6: Final answer
    x = 115,018.80

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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.