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Finding the Fourth Proportional to 74,804.40, 112,206.60 and 68,680.80

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Solution

The fourth proportional to 74,804.40, 112,206.60 and 68,680.80 is: 103,021.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,804.40 : 112,206.60 = 68,680.80 : x
  2. Step 2: Convert to fraction form
    74,804.40/112,206.60 = 68,680.80/x
  3. Step 3: Cross multiply
    74,804.40x = 112,206.60 × 68,680.80
  4. Step 4: Simplify right side
    74,804.40x = 7,706,439,053.28
  5. Step 5: Solve for x
    x = 7,706,439,053.28/74,804.40
  6. Step 6: Final answer
    x = 103,021.20

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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.