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Finding the Fourth Proportional to 70,490.48, 105,702.24 and 40,917.38

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Solution

The fourth proportional to 70,490.48, 105,702.24 and 40,917.38 is: 61,356.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,490.48 : 105,702.24 = 40,917.38 : x
  2. Step 2: Convert to fraction form
    70,490.48/105,702.24 = 40,917.38/x
  3. Step 3: Cross multiply
    70,490.48x = 105,702.24 × 40,917.38
  4. Step 4: Simplify right side
    70,490.48x = 4,325,058,720.93
  5. Step 5: Solve for x
    x = 4,325,058,720.93/70,490.48
  6. Step 6: Final answer
    x = 61,356.64

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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.