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Finding the Fourth Proportional to 108,661.40, 163,000.20 and 38,531.60

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Solution

The fourth proportional to 108,661.40, 163,000.20 and 38,531.60 is: 57,800.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,661.40 : 163,000.20 = 38,531.60 : x
  2. Step 2: Convert to fraction form
    108,661.40/163,000.20 = 38,531.60/x
  3. Step 3: Cross multiply
    108,661.40x = 163,000.20 × 38,531.60
  4. Step 4: Simplify right side
    108,661.40x = 6,280,658,506.32
  5. Step 5: Solve for x
    x = 6,280,658,506.32/108,661.40
  6. Step 6: Final answer
    x = 57,800.27

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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.