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Finding the Fourth Proportional to 51,389.99, 70,918.71 and 28,730.24

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Solution

The fourth proportional to 51,389.99, 70,918.71 and 28,730.24 is: 39,648.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,389.99 : 70,918.71 = 28,730.24 : x
  2. Step 2: Convert to fraction form
    51,389.99/70,918.71 = 28,730.24/x
  3. Step 3: Cross multiply
    51,389.99x = 70,918.71 × 28,730.24
  4. Step 4: Simplify right side
    51,389.99x = 2,037,511,524.01
  5. Step 5: Solve for x
    x = 2,037,511,524.01/51,389.99
  6. Step 6: Final answer
    x = 39,648.02

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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.