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Finding the Fourth Proportional to 169,664.32, 254,108.80 and 80,980.16

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Solution

The fourth proportional to 169,664.32, 254,108.80 and 80,980.16 is: 121,285.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,664.32 : 254,108.80 = 80,980.16 : x
  2. Step 2: Convert to fraction form
    169,664.32/254,108.80 = 80,980.16/x
  3. Step 3: Cross multiply
    169,664.32x = 254,108.80 × 80,980.16
  4. Step 4: Simplify right side
    169,664.32x = 20,577,771,281.41
  5. Step 5: Solve for x
    x = 20,577,771,281.41/169,664.32
  6. Step 6: Final answer
    x = 121,285.20

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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.