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Finding the Fourth Proportional to 81,603, 122,289.64 and 64,888.86

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Solution

The fourth proportional to 81,603, 122,289.64 and 64,888.86 is: 97,241.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,603 : 122,289.64 = 64,888.86 : x
  2. Step 2: Convert to fraction form
    81,603/122,289.64 = 64,888.86/x
  3. Step 3: Cross multiply
    81,603x = 122,289.64 × 64,888.86
  4. Step 4: Simplify right side
    81,603x = 7,935,235,329.41
  5. Step 5: Solve for x
    x = 7,935,235,329.41/81,603
  6. Step 6: Final answer
    x = 97,241.96

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1.5x scale

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.