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Finding the Fourth Proportional to 56,939.40, 85,461.36 and 28,878.99

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Solution

The fourth proportional to 56,939.40, 85,461.36 and 28,878.99 is: 43,344.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,939.40 : 85,461.36 = 28,878.99 : x
  2. Step 2: Convert to fraction form
    56,939.40/85,461.36 = 28,878.99/x
  3. Step 3: Cross multiply
    56,939.40x = 85,461.36 × 28,878.99
  4. Step 4: Simplify right side
    56,939.40x = 2,468,037,760.83
  5. Step 5: Solve for x
    x = 2,468,037,760.83/56,939.40
  6. Step 6: Final answer
    x = 43,344.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.