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Finding the Fourth Proportional to 85,412.55, 117,918.50 and 56,771.04

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Solution

The fourth proportional to 85,412.55, 117,918.50 and 56,771.04 is: 78,376.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,412.55 : 117,918.50 = 56,771.04 : x
  2. Step 2: Convert to fraction form
    85,412.55/117,918.50 = 56,771.04/x
  3. Step 3: Cross multiply
    85,412.55x = 117,918.50 × 56,771.04
  4. Step 4: Simplify right side
    85,412.55x = 6,694,355,596.38
  5. Step 5: Solve for x
    x = 6,694,355,596.38/85,412.55
  6. Step 6: Final answer
    x = 78,376.72

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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.