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Finding the Fourth Proportional to 115,915.80, 173,873.70 and 80,146.20

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Solution

The fourth proportional to 115,915.80, 173,873.70 and 80,146.20 is: 120,219.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,915.80 : 173,873.70 = 80,146.20 : x
  2. Step 2: Convert to fraction form
    115,915.80/173,873.70 = 80,146.20/x
  3. Step 3: Cross multiply
    115,915.80x = 173,873.70 × 80,146.20
  4. Step 4: Simplify right side
    115,915.80x = 13,935,316,334.94
  5. Step 5: Solve for x
    x = 13,935,316,334.94/115,915.80
  6. Step 6: Final answer
    x = 120,219.30

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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.