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Finding the Fourth Proportional to 113,745.60, 156,980.16 and 85,015.44

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Solution

The fourth proportional to 113,745.60, 156,980.16 and 85,015.44 is: 117,329.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,745.60 : 156,980.16 = 85,015.44 : x
  2. Step 2: Convert to fraction form
    113,745.60/156,980.16 = 85,015.44/x
  3. Step 3: Cross multiply
    113,745.60x = 156,980.16 × 85,015.44
  4. Step 4: Simplify right side
    113,745.60x = 13,345,737,373.67
  5. Step 5: Solve for x
    x = 13,345,737,373.67/113,745.60
  6. Step 6: Final answer
    x = 117,329.70

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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.