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Finding the Fourth Proportional to 72,987.54, 100,722.73 and 39,453.54

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Solution

The fourth proportional to 72,987.54, 100,722.73 and 39,453.54 is: 54,445.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,987.54 : 100,722.73 = 39,453.54 : x
  2. Step 2: Convert to fraction form
    72,987.54/100,722.73 = 39,453.54/x
  3. Step 3: Cross multiply
    72,987.54x = 100,722.73 × 39,453.54
  4. Step 4: Simplify right side
    72,987.54x = 3,973,868,256.96
  5. Step 5: Solve for x
    x = 3,973,868,256.96/72,987.54
  6. Step 6: Final answer
    x = 54,445.84

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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.