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Finding the Fourth Proportional to 103,640.35, 155,460.53 and 91,393.15

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Solution

The fourth proportional to 103,640.35, 155,460.53 and 91,393.15 is: 137,089.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,640.35 : 155,460.53 = 91,393.15 : x
  2. Step 2: Convert to fraction form
    103,640.35/155,460.53 = 91,393.15/x
  3. Step 3: Cross multiply
    103,640.35x = 155,460.53 × 91,393.15
  4. Step 4: Simplify right side
    103,640.35x = 14,208,027,537.37
  5. Step 5: Solve for x
    x = 14,208,027,537.37/103,640.35
  6. Step 6: Final answer
    x = 137,089.73

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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.