Home / 103,723.20-155,239.20-91,281.60

Finding the Fourth Proportional to 103,723.20, 155,239.20 and 91,281.60

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Solution

The fourth proportional to 103,723.20, 155,239.20 and 91,281.60 is: 136,618.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,723.20 : 155,239.20 = 91,281.60 : x
  2. Step 2: Convert to fraction form
    103,723.20/155,239.20 = 91,281.60/x
  3. Step 3: Cross multiply
    103,723.20x = 155,239.20 × 91,281.60
  4. Step 4: Simplify right side
    103,723.20x = 14,170,482,558.72
  5. Step 5: Solve for x
    x = 14,170,482,558.72/103,723.20
  6. Step 6: Final answer
    x = 136,618.25

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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.