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Finding the Fourth Proportional to 70,365.70, 105,554.02 and 20,446.51

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Solution

The fourth proportional to 70,365.70, 105,554.02 and 20,446.51 is: 30,671.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,365.70 : 105,554.02 = 20,446.51 : x
  2. Step 2: Convert to fraction form
    70,365.70/105,554.02 = 20,446.51/x
  3. Step 3: Cross multiply
    70,365.70x = 105,554.02 × 20,446.51
  4. Step 4: Simplify right side
    70,365.70x = 2,158,211,325.47
  5. Step 5: Solve for x
    x = 2,158,211,325.47/70,365.70
  6. Step 6: Final answer
    x = 30,671.35

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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.