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Finding the Fourth Proportional to 85,728.30, 128,592.45 and 26,582.10

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Solution

The fourth proportional to 85,728.30, 128,592.45 and 26,582.10 is: 39,873.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,728.30 : 128,592.45 = 26,582.10 : x
  2. Step 2: Convert to fraction form
    85,728.30/128,592.45 = 26,582.10/x
  3. Step 3: Cross multiply
    85,728.30x = 128,592.45 × 26,582.10
  4. Step 4: Simplify right side
    85,728.30x = 3,418,257,365.15
  5. Step 5: Solve for x
    x = 3,418,257,365.15/85,728.30
  6. Step 6: Final answer
    x = 39,873.15

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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.