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Finding the Fourth Proportional to 109,408.51, 164,112.63 and 39,287.89

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Solution

The fourth proportional to 109,408.51, 164,112.63 and 39,287.89 is: 58,931.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,408.51 : 164,112.63 = 39,287.89 : x
  2. Step 2: Convert to fraction form
    109,408.51/164,112.63 = 39,287.89/x
  3. Step 3: Cross multiply
    109,408.51x = 164,112.63 × 39,287.89
  4. Step 4: Simplify right side
    109,408.51x = 6,447,638,955.05
  5. Step 5: Solve for x
    x = 6,447,638,955.05/109,408.51
  6. Step 6: Final answer
    x = 58,931.79

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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.