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Finding the Fourth Proportional to 112,154.80, 168,005.40 and 69,905.20

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Solution

The fourth proportional to 112,154.80, 168,005.40 and 69,905.20 is: 104,716.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,154.80 : 168,005.40 = 69,905.20 : x
  2. Step 2: Convert to fraction form
    112,154.80/168,005.40 = 69,905.20/x
  3. Step 3: Cross multiply
    112,154.80x = 168,005.40 × 69,905.20
  4. Step 4: Simplify right side
    112,154.80x = 11,744,451,088.08
  5. Step 5: Solve for x
    x = 11,744,451,088.08/112,154.80
  6. Step 6: Final answer
    x = 104,716.44

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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.