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Finding the Fourth Proportional to 85,790.59, 128,642.01 and 35,857.06

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Solution

The fourth proportional to 85,790.59, 128,642.01 and 35,857.06 is: 53,767.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,790.59 : 128,642.01 = 35,857.06 : x
  2. Step 2: Convert to fraction form
    85,790.59/128,642.01 = 35,857.06/x
  3. Step 3: Cross multiply
    85,790.59x = 128,642.01 × 35,857.06
  4. Step 4: Simplify right side
    85,790.59x = 4,612,724,271.09
  5. Step 5: Solve for x
    x = 4,612,724,271.09/85,790.59
  6. Step 6: Final answer
    x = 53,767.25

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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.