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Finding the Fourth Proportional to 79,315.76, 109,457.01 and 43,505.12

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Solution

The fourth proportional to 79,315.76, 109,457.01 and 43,505.12 is: 60,037.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,315.76 : 109,457.01 = 43,505.12 : x
  2. Step 2: Convert to fraction form
    79,315.76/109,457.01 = 43,505.12/x
  3. Step 3: Cross multiply
    79,315.76x = 109,457.01 × 43,505.12
  4. Step 4: Simplify right side
    79,315.76x = 4,761,939,807.61
  5. Step 5: Solve for x
    x = 4,761,939,807.61/79,315.76
  6. Step 6: Final answer
    x = 60,037.75

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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.