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Finding the Fourth Proportional to 121,325.60, 167,989.20 and 111,994.40

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Solution

The fourth proportional to 121,325.60, 167,989.20 and 111,994.40 is: 155,069.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,325.60 : 167,989.20 = 111,994.40 : x
  2. Step 2: Convert to fraction form
    121,325.60/167,989.20 = 111,994.40/x
  3. Step 3: Cross multiply
    121,325.60x = 167,989.20 × 111,994.40
  4. Step 4: Simplify right side
    121,325.60x = 18,813,849,660.48
  5. Step 5: Solve for x
    x = 18,813,849,660.48/121,325.60
  6. Step 6: Final answer
    x = 155,069.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.