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Finding the Fourth Proportional to 85,823.79, 128,704.09 and 29,649.48

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Solution

The fourth proportional to 85,823.79, 128,704.09 and 29,649.48 is: 44,463.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,823.79 : 128,704.09 = 29,649.48 : x
  2. Step 2: Convert to fraction form
    85,823.79/128,704.09 = 29,649.48/x
  3. Step 3: Cross multiply
    85,823.79x = 128,704.09 × 29,649.48
  4. Step 4: Simplify right side
    85,823.79x = 3,816,009,342.37
  5. Step 5: Solve for x
    x = 3,816,009,342.37/85,823.79
  6. Step 6: Final answer
    x = 44,463.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.