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Finding the Fourth Proportional to 77,273.60, 115,915.80 and 30,520.40

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Solution

The fourth proportional to 77,273.60, 115,915.80 and 30,520.40 is: 45,782.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,273.60 : 115,915.80 = 30,520.40 : x
  2. Step 2: Convert to fraction form
    77,273.60/115,915.80 = 30,520.40/x
  3. Step 3: Cross multiply
    77,273.60x = 115,915.80 × 30,520.40
  4. Step 4: Simplify right side
    77,273.60x = 3,537,796,582.32
  5. Step 5: Solve for x
    x = 3,537,796,582.32/77,273.60
  6. Step 6: Final answer
    x = 45,782.73

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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.