Home / 111,516.02-153,881.88-66,186.20

Finding the Fourth Proportional to 111,516.02, 153,881.88 and 66,186.20

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Solution

The fourth proportional to 111,516.02, 153,881.88 and 66,186.20 is: 91,330.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,516.02 : 153,881.88 = 66,186.20 : x
  2. Step 2: Convert to fraction form
    111,516.02/153,881.88 = 66,186.20/x
  3. Step 3: Cross multiply
    111,516.02x = 153,881.88 × 66,186.20
  4. Step 4: Simplify right side
    111,516.02x = 10,184,856,886.06
  5. Step 5: Solve for x
    x = 10,184,856,886.06/111,516.02
  6. Step 6: Final answer
    x = 91,330.89

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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.