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Finding the Fourth Proportional to 51,038.88, 70,433.88 and 28,379.94

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Solution

The fourth proportional to 51,038.88, 70,433.88 and 28,379.94 is: 39,164.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,038.88 : 70,433.88 = 28,379.94 : x
  2. Step 2: Convert to fraction form
    51,038.88/70,433.88 = 28,379.94/x
  3. Step 3: Cross multiply
    51,038.88x = 70,433.88 × 28,379.94
  4. Step 4: Simplify right side
    51,038.88x = 1,998,909,288.37
  5. Step 5: Solve for x
    x = 1,998,909,288.37/51,038.88
  6. Step 6: Final answer
    x = 39,164.44

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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.