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Finding the Fourth Proportional to 123,980.40, 185,970.60 and 74,116.80

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Solution

The fourth proportional to 123,980.40, 185,970.60 and 74,116.80 is: 111,175.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,980.40 : 185,970.60 = 74,116.80 : x
  2. Step 2: Convert to fraction form
    123,980.40/185,970.60 = 74,116.80/x
  3. Step 3: Cross multiply
    123,980.40x = 185,970.60 × 74,116.80
  4. Step 4: Simplify right side
    123,980.40x = 13,783,545,766.08
  5. Step 5: Solve for x
    x = 13,783,545,766.08/123,980.40
  6. Step 6: Final answer
    x = 111,175.20

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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.