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Finding the Fourth Proportional to 121,015.60, 181,523.40 and 71,119.60

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Solution

The fourth proportional to 121,015.60, 181,523.40 and 71,119.60 is: 106,679.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,015.60 : 181,523.40 = 71,119.60 : x
  2. Step 2: Convert to fraction form
    121,015.60/181,523.40 = 71,119.60/x
  3. Step 3: Cross multiply
    121,015.60x = 181,523.40 × 71,119.60
  4. Step 4: Simplify right side
    121,015.60x = 12,909,871,598.64
  5. Step 5: Solve for x
    x = 12,909,871,598.64/121,015.60
  6. Step 6: Final answer
    x = 106,679.40

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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.