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Finding the Fourth Proportional to 85,915, 118,562.77 and 48,189.25

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Solution

The fourth proportional to 85,915, 118,562.77 and 48,189.25 is: 66,501.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,915 : 118,562.77 = 48,189.25 : x
  2. Step 2: Convert to fraction form
    85,915/118,562.77 = 48,189.25/x
  3. Step 3: Cross multiply
    85,915x = 118,562.77 × 48,189.25
  4. Step 4: Simplify right side
    85,915x = 5,713,450,964.22
  5. Step 5: Solve for x
    x = 5,713,450,964.22/85,915
  6. Step 6: Final answer
    x = 66,501.20

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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.