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Finding the Fourth Proportional to 127,455.80, 191,010.90 and 85,215.80

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Solution

The fourth proportional to 127,455.80, 191,010.90 and 85,215.80 is: 127,708.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,455.80 : 191,010.90 = 85,215.80 : x
  2. Step 2: Convert to fraction form
    127,455.80/191,010.90 = 85,215.80/x
  3. Step 3: Cross multiply
    127,455.80x = 191,010.90 × 85,215.80
  4. Step 4: Simplify right side
    127,455.80x = 16,277,146,652.22
  5. Step 5: Solve for x
    x = 16,277,146,652.22/127,455.80
  6. Step 6: Final answer
    x = 127,708.17

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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.