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Finding the Fourth Proportional to 108,636.80, 162,955.20 and 61,980.80

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Solution

The fourth proportional to 108,636.80, 162,955.20 and 61,980.80 is: 92,971.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,636.80 : 162,955.20 = 61,980.80 : x
  2. Step 2: Convert to fraction form
    108,636.80/162,955.20 = 61,980.80/x
  3. Step 3: Cross multiply
    108,636.80x = 162,955.20 × 61,980.80
  4. Step 4: Simplify right side
    108,636.80x = 10,100,093,660.16
  5. Step 5: Solve for x
    x = 10,100,093,660.16/108,636.80
  6. Step 6: Final answer
    x = 92,971.20

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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.