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Finding the Fourth Proportional to 85,903.92, 128,825.01 and 29,728.79

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Solution

The fourth proportional to 85,903.92, 128,825.01 and 29,728.79 is: 44,582.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,903.92 : 128,825.01 = 29,728.79 : x
  2. Step 2: Convert to fraction form
    85,903.92/128,825.01 = 29,728.79/x
  3. Step 3: Cross multiply
    85,903.92x = 128,825.01 × 29,728.79
  4. Step 4: Simplify right side
    85,903.92x = 3,829,811,024.91
  5. Step 5: Solve for x
    x = 3,829,811,024.91/85,903.92
  6. Step 6: Final answer
    x = 44,582.49

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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.