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Finding the Fourth Proportional to 70,491.21, 97,268.88 and 40,278.48

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Solution

The fourth proportional to 70,491.21, 97,268.88 and 40,278.48 is: 55,579.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,491.21 : 97,268.88 = 40,278.48 : x
  2. Step 2: Convert to fraction form
    70,491.21/97,268.88 = 40,278.48/x
  3. Step 3: Cross multiply
    70,491.21x = 97,268.88 × 40,278.48
  4. Step 4: Simplify right side
    70,491.21x = 3,917,842,637.70
  5. Step 5: Solve for x
    x = 3,917,842,637.70/70,491.21
  6. Step 6: Final answer
    x = 55,579.17

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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.