Home / 103,479.40-155,219.10-71,986.60

Finding the Fourth Proportional to 103,479.40, 155,219.10 and 71,986.60

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Solution

The fourth proportional to 103,479.40, 155,219.10 and 71,986.60 is: 107,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,479.40 : 155,219.10 = 71,986.60 : x
  2. Step 2: Convert to fraction form
    103,479.40/155,219.10 = 71,986.60/x
  3. Step 3: Cross multiply
    103,479.40x = 155,219.10 × 71,986.60
  4. Step 4: Simplify right side
    103,479.40x = 11,173,695,264.06
  5. Step 5: Solve for x
    x = 11,173,695,264.06/103,479.40
  6. Step 6: Final answer
    x = 107,979.90

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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.