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Finding the Fourth Proportional to 70,485.69, 97,269.35 and 40,270.78

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Solution

The fourth proportional to 70,485.69, 97,269.35 and 40,270.78 is: 55,573.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,485.69 : 97,269.35 = 40,270.78 : x
  2. Step 2: Convert to fraction form
    70,485.69/97,269.35 = 40,270.78/x
  3. Step 3: Cross multiply
    70,485.69x = 97,269.35 × 40,270.78
  4. Step 4: Simplify right side
    70,485.69x = 3,917,112,150.07
  5. Step 5: Solve for x
    x = 3,917,112,150.07/70,485.69
  6. Step 6: Final answer
    x = 55,573.15

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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.