Home / 85,729.19-128,588.84-25,756.38

Finding the Fourth Proportional to 85,729.19, 128,588.84 and 25,756.38

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Solution

The fourth proportional to 85,729.19, 128,588.84 and 25,756.38 is: 38,633.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,729.19 : 128,588.84 = 25,756.38 : x
  2. Step 2: Convert to fraction form
    85,729.19/128,588.84 = 25,756.38/x
  3. Step 3: Cross multiply
    85,729.19x = 128,588.84 × 25,756.38
  4. Step 4: Simplify right side
    85,729.19x = 3,311,982,994.60
  5. Step 5: Solve for x
    x = 3,311,982,994.60/85,729.19
  6. Step 6: Final answer
    x = 38,633.08

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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.