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Finding the Fourth Proportional to 84,764.40, 127,292.40 and 55,312.80

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Solution

The fourth proportional to 84,764.40, 127,292.40 and 55,312.80 is: 83,064.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,764.40 : 127,292.40 = 55,312.80 : x
  2. Step 2: Convert to fraction form
    84,764.40/127,292.40 = 55,312.80/x
  3. Step 3: Cross multiply
    84,764.40x = 127,292.40 × 55,312.80
  4. Step 4: Simplify right side
    84,764.40x = 7,040,899,062.72
  5. Step 5: Solve for x
    x = 7,040,899,062.72/84,764.40
  6. Step 6: Final answer
    x = 83,064.34

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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.