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Finding the Fourth Proportional to 51,057.91, 70,459.28 and 28,701.91

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Solution

The fourth proportional to 51,057.91, 70,459.28 and 28,701.91 is: 39,608.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,057.91 : 70,459.28 = 28,701.91 : x
  2. Step 2: Convert to fraction form
    51,057.91/70,459.28 = 28,701.91/x
  3. Step 3: Cross multiply
    51,057.91x = 70,459.28 × 28,701.91
  4. Step 4: Simplify right side
    51,057.91x = 2,022,315,913.22
  5. Step 5: Solve for x
    x = 2,022,315,913.22/51,057.91
  6. Step 6: Final answer
    x = 39,608.28

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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.