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Finding the Fourth Proportional to 111,642.48, 154,038.84 and 66,301.44

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Solution

The fourth proportional to 111,642.48, 154,038.84 and 66,301.44 is: 91,479.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,642.48 : 154,038.84 = 66,301.44 : x
  2. Step 2: Convert to fraction form
    111,642.48/154,038.84 = 66,301.44/x
  3. Step 3: Cross multiply
    111,642.48x = 154,038.84 × 66,301.44
  4. Step 4: Simplify right side
    111,642.48x = 10,212,996,907.93
  5. Step 5: Solve for x
    x = 10,212,996,907.93/111,642.48
  6. Step 6: Final answer
    x = 91,479.49

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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.