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Finding the Fourth Proportional to 85,732.41, 128,551.64 and 26,551.65

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Solution

The fourth proportional to 85,732.41, 128,551.64 and 26,551.65 is: 39,812.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,732.41 : 128,551.64 = 26,551.65 : x
  2. Step 2: Convert to fraction form
    85,732.41/128,551.64 = 26,551.65/x
  3. Step 3: Cross multiply
    85,732.41x = 128,551.64 × 26,551.65
  4. Step 4: Simplify right side
    85,732.41x = 3,413,258,019.45
  5. Step 5: Solve for x
    x = 3,413,258,019.45/85,732.41
  6. Step 6: Final answer
    x = 39,812.93

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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.