Home / 127,238.64-190,828.80-57,138

Finding the Fourth Proportional to 127,238.64, 190,828.80 and 57,138

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Solution

The fourth proportional to 127,238.64, 190,828.80 and 57,138 is: 85,693.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,238.64 : 190,828.80 = 57,138 : x
  2. Step 2: Convert to fraction form
    127,238.64/190,828.80 = 57,138/x
  3. Step 3: Cross multiply
    127,238.64x = 190,828.80 × 57,138
  4. Step 4: Simplify right side
    127,238.64x = 10,903,575,974.40
  5. Step 5: Solve for x
    x = 10,903,575,974.40/127,238.64
  6. Step 6: Final answer
    x = 85,693.91

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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.