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Finding the Fourth Proportional to 85,382.70, 128,055.68 and 25,396.74

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Solution

The fourth proportional to 85,382.70, 128,055.68 and 25,396.74 is: 38,089.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,382.70 : 128,055.68 = 25,396.74 : x
  2. Step 2: Convert to fraction form
    85,382.70/128,055.68 = 25,396.74/x
  3. Step 3: Cross multiply
    85,382.70x = 128,055.68 × 25,396.74
  4. Step 4: Simplify right side
    85,382.70x = 3,252,196,810.48
  5. Step 5: Solve for x
    x = 3,252,196,810.48/85,382.70
  6. Step 6: Final answer
    x = 38,089.65

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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.