Home / 127,977.90-191,966.85-81,437.10

Finding the Fourth Proportional to 127,977.90, 191,966.85 and 81,437.10

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Solution

The fourth proportional to 127,977.90, 191,966.85 and 81,437.10 is: 122,155.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,977.90 : 191,966.85 = 81,437.10 : x
  2. Step 2: Convert to fraction form
    127,977.90/191,966.85 = 81,437.10/x
  3. Step 3: Cross multiply
    127,977.90x = 191,966.85 × 81,437.10
  4. Step 4: Simplify right side
    127,977.90x = 15,633,223,560.14
  5. Step 5: Solve for x
    x = 15,633,223,560.14/127,977.90
  6. Step 6: Final answer
    x = 122,155.65

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1.5x scale

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.