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Finding the Fourth Proportional to 108,036.80, 162,055.20 and 68,638.40

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Solution

The fourth proportional to 108,036.80, 162,055.20 and 68,638.40 is: 102,957.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,036.80 : 162,055.20 = 68,638.40 : x
  2. Step 2: Convert to fraction form
    108,036.80/162,055.20 = 68,638.40/x
  3. Step 3: Cross multiply
    108,036.80x = 162,055.20 × 68,638.40
  4. Step 4: Simplify right side
    108,036.80x = 11,123,209,639.68
  5. Step 5: Solve for x
    x = 11,123,209,639.68/108,036.80
  6. Step 6: Final answer
    x = 102,957.60

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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.