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Finding the Fourth Proportional to 72,649.36, 100,300.85 and 57,602.80

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Solution

The fourth proportional to 72,649.36, 100,300.85 and 57,602.80 is: 79,527.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,649.36 : 100,300.85 = 57,602.80 : x
  2. Step 2: Convert to fraction form
    72,649.36/100,300.85 = 57,602.80/x
  3. Step 3: Cross multiply
    72,649.36x = 100,300.85 × 57,602.80
  4. Step 4: Simplify right side
    72,649.36x = 5,777,609,514.37
  5. Step 5: Solve for x
    x = 5,777,609,514.37/72,649.36
  6. Step 6: Final answer
    x = 79,527.33

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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.