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Finding the Fourth Proportional to 60,789.72, 91,016.64 and 31,143.72

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Solution

The fourth proportional to 60,789.72, 91,016.64 and 31,143.72 is: 46,629.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,789.72 : 91,016.64 = 31,143.72 : x
  2. Step 2: Convert to fraction form
    60,789.72/91,016.64 = 31,143.72/x
  3. Step 3: Cross multiply
    60,789.72x = 91,016.64 × 31,143.72
  4. Step 4: Simplify right side
    60,789.72x = 2,834,596,751.50
  5. Step 5: Solve for x
    x = 2,834,596,751.50/60,789.72
  6. Step 6: Final answer
    x = 46,629.54

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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.