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Finding the Fourth Proportional to 100,454.58, 138,629.61 and 56,843.64

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Solution

The fourth proportional to 100,454.58, 138,629.61 and 56,843.64 is: 78,445.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,454.58 : 138,629.61 = 56,843.64 : x
  2. Step 2: Convert to fraction form
    100,454.58/138,629.61 = 56,843.64/x
  3. Step 3: Cross multiply
    100,454.58x = 138,629.61 × 56,843.64
  4. Step 4: Simplify right side
    100,454.58x = 7,880,211,644.18
  5. Step 5: Solve for x
    x = 7,880,211,644.18/100,454.58
  6. Step 6: Final answer
    x = 78,445.52

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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.