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Finding the Fourth Proportional to 78,295.66, 108,047.67 and 42,485.61

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Solution

The fourth proportional to 78,295.66, 108,047.67 and 42,485.61 is: 58,629.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,295.66 : 108,047.67 = 42,485.61 : x
  2. Step 2: Convert to fraction form
    78,295.66/108,047.67 = 42,485.61/x
  3. Step 3: Cross multiply
    78,295.66x = 108,047.67 × 42,485.61
  4. Step 4: Simplify right side
    78,295.66x = 4,590,471,653.87
  5. Step 5: Solve for x
    x = 4,590,471,653.87/78,295.66
  6. Step 6: Final answer
    x = 58,629.96

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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.