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Finding the Fourth Proportional to 85,815.30, 128,809.35 and 41,477.70

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Solution

The fourth proportional to 85,815.30, 128,809.35 and 41,477.70 is: 62,258.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,815.30 : 128,809.35 = 41,477.70 : x
  2. Step 2: Convert to fraction form
    85,815.30/128,809.35 = 41,477.70/x
  3. Step 3: Cross multiply
    85,815.30x = 128,809.35 × 41,477.70
  4. Step 4: Simplify right side
    85,815.30x = 5,342,715,576.50
  5. Step 5: Solve for x
    x = 5,342,715,576.50/85,815.30
  6. Step 6: Final answer
    x = 62,258.31

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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.