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Finding the Fourth Proportional to 72,640, 100,243.20 and 46,190.08

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Solution

The fourth proportional to 72,640, 100,243.20 and 46,190.08 is: 63,742.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,640 : 100,243.20 = 46,190.08 : x
  2. Step 2: Convert to fraction form
    72,640/100,243.20 = 46,190.08/x
  3. Step 3: Cross multiply
    72,640x = 100,243.20 × 46,190.08
  4. Step 4: Simplify right side
    72,640x = 4,630,241,427.46
  5. Step 5: Solve for x
    x = 4,630,241,427.46/72,640
  6. Step 6: Final answer
    x = 63,742.31

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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.