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Finding the Fourth Proportional to 122,431.60, 183,647.40 and 84,912.40

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Solution

The fourth proportional to 122,431.60, 183,647.40 and 84,912.40 is: 127,368.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,431.60 : 183,647.40 = 84,912.40 : x
  2. Step 2: Convert to fraction form
    122,431.60/183,647.40 = 84,912.40/x
  3. Step 3: Cross multiply
    122,431.60x = 183,647.40 × 84,912.40
  4. Step 4: Simplify right side
    122,431.60x = 15,593,941,487.76
  5. Step 5: Solve for x
    x = 15,593,941,487.76/122,431.60
  6. Step 6: Final answer
    x = 127,368.60

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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.