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Finding the Fourth Proportional to 70,809.60, 97,723.52 and 40,605.60

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Solution

The fourth proportional to 70,809.60, 97,723.52 and 40,605.60 is: 56,039.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,809.60 : 97,723.52 = 40,605.60 : x
  2. Step 2: Convert to fraction form
    70,809.60/97,723.52 = 40,605.60/x
  3. Step 3: Cross multiply
    70,809.60x = 97,723.52 × 40,605.60
  4. Step 4: Simplify right side
    70,809.60x = 3,968,122,163.71
  5. Step 5: Solve for x
    x = 3,968,122,163.71/70,809.60
  6. Step 6: Final answer
    x = 56,039.32

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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.