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Finding the Fourth Proportional to 78,804, 118,238.40 and 57,851.28

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Solution

The fourth proportional to 78,804, 118,238.40 and 57,851.28 is: 86,800.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,804 : 118,238.40 = 57,851.28 : x
  2. Step 2: Convert to fraction form
    78,804/118,238.40 = 57,851.28/x
  3. Step 3: Cross multiply
    78,804x = 118,238.40 × 57,851.28
  4. Step 4: Simplify right side
    78,804x = 6,840,242,785.15
  5. Step 5: Solve for x
    x = 6,840,242,785.15/78,804
  6. Step 6: Final answer
    x = 86,800.71

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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.