Home / 127,490.90-191,036.55-80,644.82

Finding the Fourth Proportional to 127,490.90, 191,036.55 and 80,644.82

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Solution

The fourth proportional to 127,490.90, 191,036.55 and 80,644.82 is: 120,840.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,490.90 : 191,036.55 = 80,644.82 : x
  2. Step 2: Convert to fraction form
    127,490.90/191,036.55 = 80,644.82/x
  3. Step 3: Cross multiply
    127,490.90x = 191,036.55 × 80,644.82
  4. Step 4: Simplify right side
    127,490.90x = 15,406,108,188.17
  5. Step 5: Solve for x
    x = 15,406,108,188.17/127,490.90
  6. Step 6: Final answer
    x = 120,840.85

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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.