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Finding the Fourth Proportional to 113,085.20, 169,627.80 and 103,408.40

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Solution

The fourth proportional to 113,085.20, 169,627.80 and 103,408.40 is: 155,112.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,085.20 : 169,627.80 = 103,408.40 : x
  2. Step 2: Convert to fraction form
    113,085.20/169,627.80 = 103,408.40/x
  3. Step 3: Cross multiply
    113,085.20x = 169,627.80 × 103,408.40
  4. Step 4: Simplify right side
    113,085.20x = 17,540,939,393.52
  5. Step 5: Solve for x
    x = 17,540,939,393.52/113,085.20
  6. Step 6: Final answer
    x = 155,112.60

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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.