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Finding the Fourth Proportional to 70,920.78, 106,381.56 and 18,326.64

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Solution

The fourth proportional to 70,920.78, 106,381.56 and 18,326.64 is: 27,490.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,920.78 : 106,381.56 = 18,326.64 : x
  2. Step 2: Convert to fraction form
    70,920.78/106,381.56 = 18,326.64/x
  3. Step 3: Cross multiply
    70,920.78x = 106,381.56 × 18,326.64
  4. Step 4: Simplify right side
    70,920.78x = 1,949,616,552.76
  5. Step 5: Solve for x
    x = 1,949,616,552.76/70,920.78
  6. Step 6: Final answer
    x = 27,490.06

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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.