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Finding the Fourth Proportional to 72,618.39, 100,212.75 and 41,990.76

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Solution

The fourth proportional to 72,618.39, 100,212.75 and 41,990.76 is: 57,946.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,618.39 : 100,212.75 = 41,990.76 : x
  2. Step 2: Convert to fraction form
    72,618.39/100,212.75 = 41,990.76/x
  3. Step 3: Cross multiply
    72,618.39x = 100,212.75 × 41,990.76
  4. Step 4: Simplify right side
    72,618.39x = 4,208,009,534.19
  5. Step 5: Solve for x
    x = 4,208,009,534.19/72,618.39
  6. Step 6: Final answer
    x = 57,946.89

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1.5x scale

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.