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Finding the Fourth Proportional to 108,905.70, 163,358.55 and 105,989.70

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Solution

The fourth proportional to 108,905.70, 163,358.55 and 105,989.70 is: 158,984.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,905.70 : 163,358.55 = 105,989.70 : x
  2. Step 2: Convert to fraction form
    108,905.70/163,358.55 = 105,989.70/x
  3. Step 3: Cross multiply
    108,905.70x = 163,358.55 × 105,989.70
  4. Step 4: Simplify right side
    108,905.70x = 17,314,323,706.94
  5. Step 5: Solve for x
    x = 17,314,323,706.94/108,905.70
  6. Step 6: Final answer
    x = 158,984.55

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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.