Home / 85,428.14-128,154.47-26,268.80

Finding the Fourth Proportional to 85,428.14, 128,154.47 and 26,268.80

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Solution

The fourth proportional to 85,428.14, 128,154.47 and 26,268.80 is: 39,406.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,428.14 : 128,154.47 = 26,268.80 : x
  2. Step 2: Convert to fraction form
    85,428.14/128,154.47 = 26,268.80/x
  3. Step 3: Cross multiply
    85,428.14x = 128,154.47 × 26,268.80
  4. Step 4: Simplify right side
    85,428.14x = 3,366,463,369.42
  5. Step 5: Solve for x
    x = 3,366,463,369.42/85,428.14
  6. Step 6: Final answer
    x = 39,406.96

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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.