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Finding the Fourth Proportional to 111,920.24, 154,402.80 and 74,128.88

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Solution

The fourth proportional to 111,920.24, 154,402.80 and 74,128.88 is: 102,266.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,920.24 : 154,402.80 = 74,128.88 : x
  2. Step 2: Convert to fraction form
    111,920.24/154,402.80 = 74,128.88/x
  3. Step 3: Cross multiply
    111,920.24x = 154,402.80 × 74,128.88
  4. Step 4: Simplify right side
    111,920.24x = 11,445,706,632.86
  5. Step 5: Solve for x
    x = 11,445,706,632.86/111,920.24
  6. Step 6: Final answer
    x = 102,266.64

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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.