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Finding the Fourth Proportional to 164,410.20, 246,615.30 and 128,980.80

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Solution

The fourth proportional to 164,410.20, 246,615.30 and 128,980.80 is: 193,471.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,410.20 : 246,615.30 = 128,980.80 : x
  2. Step 2: Convert to fraction form
    164,410.20/246,615.30 = 128,980.80/x
  3. Step 3: Cross multiply
    164,410.20x = 246,615.30 × 128,980.80
  4. Step 4: Simplify right side
    164,410.20x = 31,808,638,686.24
  5. Step 5: Solve for x
    x = 31,808,638,686.24/164,410.20
  6. Step 6: Final answer
    x = 193,471.20

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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.