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Finding the Fourth Proportional to 85,230.40, 117,645.60 and 56,942.40

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Solution

The fourth proportional to 85,230.40, 117,645.60 and 56,942.40 is: 78,598.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,230.40 : 117,645.60 = 56,942.40 : x
  2. Step 2: Convert to fraction form
    85,230.40/117,645.60 = 56,942.40/x
  3. Step 3: Cross multiply
    85,230.40x = 117,645.60 × 56,942.40
  4. Step 4: Simplify right side
    85,230.40x = 6,699,022,813.44
  5. Step 5: Solve for x
    x = 6,699,022,813.44/85,230.40
  6. Step 6: Final answer
    x = 78,598.98

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1.5x scale

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.