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Finding the Fourth Proportional to 51,056.91, 70,457.90 and 28,700.91

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Solution

The fourth proportional to 51,056.91, 70,457.90 and 28,700.91 is: 39,606.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,056.91 : 70,457.90 = 28,700.91 : x
  2. Step 2: Convert to fraction form
    51,056.91/70,457.90 = 28,700.91/x
  3. Step 3: Cross multiply
    51,056.91x = 70,457.90 × 28,700.91
  4. Step 4: Simplify right side
    51,056.91x = 2,022,205,566.15
  5. Step 5: Solve for x
    x = 2,022,205,566.15/51,056.91
  6. Step 6: Final answer
    x = 39,606.90

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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.