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Finding the Fourth Proportional to 74,097.40, 111,264.90 and 68,639.80

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Solution

The fourth proportional to 74,097.40, 111,264.90 and 68,639.80 is: 103,069.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,097.40 : 111,264.90 = 68,639.80 : x
  2. Step 2: Convert to fraction form
    74,097.40/111,264.90 = 68,639.80/x
  3. Step 3: Cross multiply
    74,097.40x = 111,264.90 × 68,639.80
  4. Step 4: Simplify right side
    74,097.40x = 7,637,200,483.02
  5. Step 5: Solve for x
    x = 7,637,200,483.02/74,097.40
  6. Step 6: Final answer
    x = 103,069.75

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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.