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Finding the Fourth Proportional to 81,017.40, 121,526.10 and 73,241.40

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Solution

The fourth proportional to 81,017.40, 121,526.10 and 73,241.40 is: 109,862.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,017.40 : 121,526.10 = 73,241.40 : x
  2. Step 2: Convert to fraction form
    81,017.40/121,526.10 = 73,241.40/x
  3. Step 3: Cross multiply
    81,017.40x = 121,526.10 × 73,241.40
  4. Step 4: Simplify right side
    81,017.40x = 8,900,741,700.54
  5. Step 5: Solve for x
    x = 8,900,741,700.54/81,017.40
  6. Step 6: Final answer
    x = 109,862.10

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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.