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Finding the Fourth Proportional to 102,418.40, 153,627.60 and 81,682.40

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Solution

The fourth proportional to 102,418.40, 153,627.60 and 81,682.40 is: 122,523.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,418.40 : 153,627.60 = 81,682.40 : x
  2. Step 2: Convert to fraction form
    102,418.40/153,627.60 = 81,682.40/x
  3. Step 3: Cross multiply
    102,418.40x = 153,627.60 × 81,682.40
  4. Step 4: Simplify right side
    102,418.40x = 12,548,671,074.24
  5. Step 5: Solve for x
    x = 12,548,671,074.24/102,418.40
  6. Step 6: Final answer
    x = 122,523.60

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1.5x scale

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.