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Finding the Fourth Proportional to 67,729.50, 93,477.78 and 64,739.52

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Solution

The fourth proportional to 67,729.50, 93,477.78 and 64,739.52 is: 89,351.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,729.50 : 93,477.78 = 64,739.52 : x
  2. Step 2: Convert to fraction form
    67,729.50/93,477.78 = 64,739.52/x
  3. Step 3: Cross multiply
    67,729.50x = 93,477.78 × 64,739.52
  4. Step 4: Simplify right side
    67,729.50x = 6,051,706,607.87
  5. Step 5: Solve for x
    x = 6,051,706,607.87/67,729.50
  6. Step 6: Final answer
    x = 89,351.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.