Home / 111,515.02-153,880.50-66,185.20

Finding the Fourth Proportional to 111,515.02, 153,880.50 and 66,185.20

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Solution

The fourth proportional to 111,515.02, 153,880.50 and 66,185.20 is: 91,329.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,515.02 : 153,880.50 = 66,185.20 : x
  2. Step 2: Convert to fraction form
    111,515.02/153,880.50 = 66,185.20/x
  3. Step 3: Cross multiply
    111,515.02x = 153,880.50 × 66,185.20
  4. Step 4: Simplify right side
    111,515.02x = 10,184,611,668.60
  5. Step 5: Solve for x
    x = 10,184,611,668.60/111,515.02
  6. Step 6: Final answer
    x = 91,329.51

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.