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Finding the Fourth Proportional to 108,703.10, 163,111.66 and 78,963.04

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Solution

The fourth proportional to 108,703.10, 163,111.66 and 78,963.04 is: 118,485.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,703.10 : 163,111.66 = 78,963.04 : x
  2. Step 2: Convert to fraction form
    108,703.10/163,111.66 = 78,963.04/x
  3. Step 3: Cross multiply
    108,703.10x = 163,111.66 × 78,963.04
  4. Step 4: Simplify right side
    108,703.10x = 12,879,792,533.05
  5. Step 5: Solve for x
    x = 12,879,792,533.05/108,703.10
  6. Step 6: Final answer
    x = 118,485.97

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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.