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Finding the Fourth Proportional to 68,005.44, 102,008.16 and 21,258.72

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Solution

The fourth proportional to 68,005.44, 102,008.16 and 21,258.72 is: 31,888.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,005.44 : 102,008.16 = 21,258.72 : x
  2. Step 2: Convert to fraction form
    68,005.44/102,008.16 = 21,258.72/x
  3. Step 3: Cross multiply
    68,005.44x = 102,008.16 × 21,258.72
  4. Step 4: Simplify right side
    68,005.44x = 2,168,562,911.16
  5. Step 5: Solve for x
    x = 2,168,562,911.16/68,005.44
  6. Step 6: Final answer
    x = 31,888.08

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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.