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Finding the Fourth Proportional to 108,683.40, 163,025.10 and 78,745.80

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Solution

The fourth proportional to 108,683.40, 163,025.10 and 78,745.80 is: 118,118.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,683.40 : 163,025.10 = 78,745.80 : x
  2. Step 2: Convert to fraction form
    108,683.40/163,025.10 = 78,745.80/x
  3. Step 3: Cross multiply
    108,683.40x = 163,025.10 × 78,745.80
  4. Step 4: Simplify right side
    108,683.40x = 12,837,541,919.58
  5. Step 5: Solve for x
    x = 12,837,541,919.58/108,683.40
  6. Step 6: Final answer
    x = 118,118.70

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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.