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Finding the Fourth Proportional to 51,147.54, 70,583.63 and 28,490.90

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Solution

The fourth proportional to 51,147.54, 70,583.63 and 28,490.90 is: 39,317.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,147.54 : 70,583.63 = 28,490.90 : x
  2. Step 2: Convert to fraction form
    51,147.54/70,583.63 = 28,490.90/x
  3. Step 3: Cross multiply
    51,147.54x = 70,583.63 × 28,490.90
  4. Step 4: Simplify right side
    51,147.54x = 2,010,990,648.59
  5. Step 5: Solve for x
    x = 2,010,990,648.59/51,147.54
  6. Step 6: Final answer
    x = 39,317.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.