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Finding the Fourth Proportional to 109,920.60, 154,355.40 and 109,920.60

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Solution

The fourth proportional to 109,920.60, 154,355.40 and 109,920.60 is: 154,355.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,920.60 : 154,355.40 = 109,920.60 : x
  2. Step 2: Convert to fraction form
    109,920.60/154,355.40 = 109,920.60/x
  3. Step 3: Cross multiply
    109,920.60x = 154,355.40 × 109,920.60
  4. Step 4: Simplify right side
    109,920.60x = 16,966,838,181.24
  5. Step 5: Solve for x
    x = 16,966,838,181.24/109,920.60
  6. Step 6: Final answer
    x = 154,355.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.