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Finding the Fourth Proportional to 90,019.20, 134,942.40 and 70,017.60

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Solution

The fourth proportional to 90,019.20, 134,942.40 and 70,017.60 is: 104,959.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,019.20 : 134,942.40 = 70,017.60 : x
  2. Step 2: Convert to fraction form
    90,019.20/134,942.40 = 70,017.60/x
  3. Step 3: Cross multiply
    90,019.20x = 134,942.40 × 70,017.60
  4. Step 4: Simplify right side
    90,019.20x = 9,448,342,986.24
  5. Step 5: Solve for x
    x = 9,448,342,986.24/90,019.20
  6. Step 6: Final answer
    x = 104,959.20

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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.