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Finding the Fourth Proportional to 70,386.96, 105,518.56 and 36,581.80

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Solution

The fourth proportional to 70,386.96, 105,518.56 and 36,581.80 is: 54,840.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,386.96 : 105,518.56 = 36,581.80 : x
  2. Step 2: Convert to fraction form
    70,386.96/105,518.56 = 36,581.80/x
  3. Step 3: Cross multiply
    70,386.96x = 105,518.56 × 36,581.80
  4. Step 4: Simplify right side
    70,386.96x = 3,860,058,858.21
  5. Step 5: Solve for x
    x = 3,860,058,858.21/70,386.96
  6. Step 6: Final answer
    x = 54,840.54

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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.