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Finding the Fourth Proportional to 122,521.60, 183,739.20 and 43,638.40

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Solution

The fourth proportional to 122,521.60, 183,739.20 and 43,638.40 is: 65,442.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,521.60 : 183,739.20 = 43,638.40 : x
  2. Step 2: Convert to fraction form
    122,521.60/183,739.20 = 43,638.40/x
  3. Step 3: Cross multiply
    122,521.60x = 183,739.20 × 43,638.40
  4. Step 4: Simplify right side
    122,521.60x = 8,018,084,705.28
  5. Step 5: Solve for x
    x = 8,018,084,705.28/122,521.60
  6. Step 6: Final answer
    x = 65,442.21

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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.