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Finding the Fourth Proportional to 128,652.66, 177,627.42 and 80,328.24

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Solution

The fourth proportional to 128,652.66, 177,627.42 and 80,328.24 is: 110,907.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,652.66 : 177,627.42 = 80,328.24 : x
  2. Step 2: Convert to fraction form
    128,652.66/177,627.42 = 80,328.24/x
  3. Step 3: Cross multiply
    128,652.66x = 177,627.42 × 80,328.24
  4. Step 4: Simplify right side
    128,652.66x = 14,268,498,024.34
  5. Step 5: Solve for x
    x = 14,268,498,024.34/128,652.66
  6. Step 6: Final answer
    x = 110,907.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.