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Finding the Fourth Proportional to 127,918.96, 191,878.89 and 39,172.07

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Solution

The fourth proportional to 127,918.96, 191,878.89 and 39,172.07 is: 58,758.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,918.96 : 191,878.89 = 39,172.07 : x
  2. Step 2: Convert to fraction form
    127,918.96/191,878.89 = 39,172.07/x
  3. Step 3: Cross multiply
    127,918.96x = 191,878.89 × 39,172.07
  4. Step 4: Simplify right side
    127,918.96x = 7,516,293,643.40
  5. Step 5: Solve for x
    x = 7,516,293,643.40/127,918.96
  6. Step 6: Final answer
    x = 58,758.25

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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.