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Finding the Fourth Proportional to 85,718.20, 128,597.83 and 35,770.51

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Solution

The fourth proportional to 85,718.20, 128,597.83 and 35,770.51 is: 53,664.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,718.20 : 128,597.83 = 35,770.51 : x
  2. Step 2: Convert to fraction form
    85,718.20/128,597.83 = 35,770.51/x
  3. Step 3: Cross multiply
    85,718.20x = 128,597.83 × 35,770.51
  4. Step 4: Simplify right side
    85,718.20x = 4,600,009,963.99
  5. Step 5: Solve for x
    x = 4,600,009,963.99/85,718.20
  6. Step 6: Final answer
    x = 53,664.33

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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.