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Finding the Fourth Proportional to 78,940.58, 118,457.54 and 29,055.71

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Solution

The fourth proportional to 78,940.58, 118,457.54 and 29,055.71 is: 43,600.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,940.58 : 118,457.54 = 29,055.71 : x
  2. Step 2: Convert to fraction form
    78,940.58/118,457.54 = 29,055.71/x
  3. Step 3: Cross multiply
    78,940.58x = 118,457.54 × 29,055.71
  4. Step 4: Simplify right side
    78,940.58x = 3,441,868,189.38
  5. Step 5: Solve for x
    x = 3,441,868,189.38/78,940.58
  6. Step 6: Final answer
    x = 43,600.75

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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.