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Finding the Fourth Proportional to 51,095.76, 70,512.72 and 28,739.76

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Solution

The fourth proportional to 51,095.76, 70,512.72 and 28,739.76 is: 39,661.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,095.76 : 70,512.72 = 28,739.76 : x
  2. Step 2: Convert to fraction form
    51,095.76/70,512.72 = 28,739.76/x
  3. Step 3: Cross multiply
    51,095.76x = 70,512.72 × 28,739.76
  4. Step 4: Simplify right side
    51,095.76x = 2,026,518,649.75
  5. Step 5: Solve for x
    x = 2,026,518,649.75/51,095.76
  6. Step 6: Final answer
    x = 39,661.19

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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.