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Finding the Fourth Proportional to 103,661.85, 155,486.45 and 60,990.95

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Solution

The fourth proportional to 103,661.85, 155,486.45 and 60,990.95 is: 91,482.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,661.85 : 155,486.45 = 60,990.95 : x
  2. Step 2: Convert to fraction form
    103,661.85/155,486.45 = 60,990.95/x
  3. Step 3: Cross multiply
    103,661.85x = 155,486.45 × 60,990.95
  4. Step 4: Simplify right side
    103,661.85x = 9,483,266,297.63
  5. Step 5: Solve for x
    x = 9,483,266,297.63/103,661.85
  6. Step 6: Final answer
    x = 91,482.70

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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.