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Finding the Fourth Proportional to 122,981.60, 184,472.40 and 69,618.80

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Solution

The fourth proportional to 122,981.60, 184,472.40 and 69,618.80 is: 104,428.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,981.60 : 184,472.40 = 69,618.80 : x
  2. Step 2: Convert to fraction form
    122,981.60/184,472.40 = 69,618.80/x
  3. Step 3: Cross multiply
    122,981.60x = 184,472.40 × 69,618.80
  4. Step 4: Simplify right side
    122,981.60x = 12,842,747,121.12
  5. Step 5: Solve for x
    x = 12,842,747,121.12/122,981.60
  6. Step 6: Final answer
    x = 104,428.20

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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.