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Finding the Fourth Proportional to 81,579.60, 122,223.60 and 69,915.60

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Solution

The fourth proportional to 81,579.60, 122,223.60 and 69,915.60 is: 104,748.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,579.60 : 122,223.60 = 69,915.60 : x
  2. Step 2: Convert to fraction form
    81,579.60/122,223.60 = 69,915.60/x
  3. Step 3: Cross multiply
    81,579.60x = 122,223.60 × 69,915.60
  4. Step 4: Simplify right side
    81,579.60x = 8,545,336,328.16
  5. Step 5: Solve for x
    x = 8,545,336,328.16/81,579.60
  6. Step 6: Final answer
    x = 104,748.45

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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.