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Finding the Fourth Proportional to 51,259.86, 70,739.19 and 28,903.86

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Solution

The fourth proportional to 51,259.86, 70,739.19 and 28,903.86 is: 39,887.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,259.86 : 70,739.19 = 28,903.86 : x
  2. Step 2: Convert to fraction form
    51,259.86/70,739.19 = 28,903.86/x
  3. Step 3: Cross multiply
    51,259.86x = 70,739.19 × 28,903.86
  4. Step 4: Simplify right side
    51,259.86x = 2,044,635,644.27
  5. Step 5: Solve for x
    x = 2,044,635,644.27/51,259.86
  6. Step 6: Final answer
    x = 39,887.66

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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.