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Finding the Fourth Proportional to 70,842.70, 97,736.52 and 40,617.28

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Solution

The fourth proportional to 70,842.70, 97,736.52 and 40,617.28 is: 56,036.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,842.70 : 97,736.52 = 40,617.28 : x
  2. Step 2: Convert to fraction form
    70,842.70/97,736.52 = 40,617.28/x
  3. Step 3: Cross multiply
    70,842.70x = 97,736.52 × 40,617.28
  4. Step 4: Simplify right side
    70,842.70x = 3,969,791,599.07
  5. Step 5: Solve for x
    x = 3,969,791,599.07/70,842.70
  6. Step 6: Final answer
    x = 56,036.71

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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.