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Finding the Fourth Proportional to 85,715.03, 128,621.16 and 46,271.27

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Solution

The fourth proportional to 85,715.03, 128,621.16 and 46,271.27 is: 69,433.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,715.03 : 128,621.16 = 46,271.27 : x
  2. Step 2: Convert to fraction form
    85,715.03/128,621.16 = 46,271.27/x
  3. Step 3: Cross multiply
    85,715.03x = 128,621.16 × 46,271.27
  4. Step 4: Simplify right side
    85,715.03x = 5,951,464,743.63
  5. Step 5: Solve for x
    x = 5,951,464,743.63/85,715.03
  6. Step 6: Final answer
    x = 69,433.15

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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.