Home / 127,977.40-191,966.10-81,436.60

Finding the Fourth Proportional to 127,977.40, 191,966.10 and 81,436.60

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Solution

The fourth proportional to 127,977.40, 191,966.10 and 81,436.60 is: 122,154.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,977.40 : 191,966.10 = 81,436.60 : x
  2. Step 2: Convert to fraction form
    127,977.40/191,966.10 = 81,436.60/x
  3. Step 3: Cross multiply
    127,977.40x = 191,966.10 × 81,436.60
  4. Step 4: Simplify right side
    127,977.40x = 15,633,066,499.26
  5. Step 5: Solve for x
    x = 15,633,066,499.26/127,977.40
  6. Step 6: Final answer
    x = 122,154.90

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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.