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Finding the Fourth Proportional to 108,905.40, 163,358.10 and 64,509.30

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Solution

The fourth proportional to 108,905.40, 163,358.10 and 64,509.30 is: 96,763.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,905.40 : 163,358.10 = 64,509.30 : x
  2. Step 2: Convert to fraction form
    108,905.40/163,358.10 = 64,509.30/x
  3. Step 3: Cross multiply
    108,905.40x = 163,358.10 × 64,509.30
  4. Step 4: Simplify right side
    108,905.40x = 10,538,116,680.33
  5. Step 5: Solve for x
    x = 10,538,116,680.33/108,905.40
  6. Step 6: Final answer
    x = 96,763.95

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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.