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Finding the Fourth Proportional to 122,389.64, 183,485.64 and 47,471.12

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Solution

The fourth proportional to 122,389.64, 183,485.64 and 47,471.12 is: 71,168.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,389.64 : 183,485.64 = 47,471.12 : x
  2. Step 2: Convert to fraction form
    122,389.64/183,485.64 = 47,471.12/x
  3. Step 3: Cross multiply
    122,389.64x = 183,485.64 × 47,471.12
  4. Step 4: Simplify right side
    122,389.64x = 8,710,268,834.72
  5. Step 5: Solve for x
    x = 8,710,268,834.72/122,389.64
  6. Step 6: Final answer
    x = 71,168.35

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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.