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Finding the Fourth Proportional to 64,728.67, 97,103.46 and 19,140.99

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Solution

The fourth proportional to 64,728.67, 97,103.46 and 19,140.99 is: 28,714.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,728.67 : 97,103.46 = 19,140.99 : x
  2. Step 2: Convert to fraction form
    64,728.67/97,103.46 = 19,140.99/x
  3. Step 3: Cross multiply
    64,728.67x = 97,103.46 × 19,140.99
  4. Step 4: Simplify right side
    64,728.67x = 1,858,656,356.83
  5. Step 5: Solve for x
    x = 1,858,656,356.83/64,728.67
  6. Step 6: Final answer
    x = 28,714.58

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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.