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Finding the Fourth Proportional to 212,647.36, 318,973.48 and 91,051.52

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Solution

The fourth proportional to 212,647.36, 318,973.48 and 91,051.52 is: 136,578.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,647.36 : 318,973.48 = 91,051.52 : x
  2. Step 2: Convert to fraction form
    212,647.36/318,973.48 = 91,051.52/x
  3. Step 3: Cross multiply
    212,647.36x = 318,973.48 × 91,051.52
  4. Step 4: Simplify right side
    212,647.36x = 29,043,020,193.69
  5. Step 5: Solve for x
    x = 29,043,020,193.69/212,647.36
  6. Step 6: Final answer
    x = 136,578.32

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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.