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Finding the Fourth Proportional to 78,804.95, 108,751.19 and 42,995.70

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Solution

The fourth proportional to 78,804.95, 108,751.19 and 42,995.70 is: 59,334.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,804.95 : 108,751.19 = 42,995.70 : x
  2. Step 2: Convert to fraction form
    78,804.95/108,751.19 = 42,995.70/x
  3. Step 3: Cross multiply
    78,804.95x = 108,751.19 × 42,995.70
  4. Step 4: Simplify right side
    78,804.95x = 4,675,833,324.90
  5. Step 5: Solve for x
    x = 4,675,833,324.90/78,804.95
  6. Step 6: Final answer
    x = 59,334.26

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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.