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Finding the Fourth Proportional to 72,953.57, 100,675.89 and 39,419.57

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Solution

The fourth proportional to 72,953.57, 100,675.89 and 39,419.57 is: 54,398.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,953.57 : 100,675.89 = 39,419.57 : x
  2. Step 2: Convert to fraction form
    72,953.57/100,675.89 = 39,419.57/x
  3. Step 3: Cross multiply
    72,953.57x = 100,675.89 × 39,419.57
  4. Step 4: Simplify right side
    72,953.57x = 3,968,599,789.79
  5. Step 5: Solve for x
    x = 3,968,599,789.79/72,953.57
  6. Step 6: Final answer
    x = 54,398.98

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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.