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Finding the Fourth Proportional to 118,540.61, 163,601.02 and 77,739.07

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Solution

The fourth proportional to 118,540.61, 163,601.02 and 77,739.07 is: 107,289.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,540.61 : 163,601.02 = 77,739.07 : x
  2. Step 2: Convert to fraction form
    118,540.61/163,601.02 = 77,739.07/x
  3. Step 3: Cross multiply
    118,540.61x = 163,601.02 × 77,739.07
  4. Step 4: Simplify right side
    118,540.61x = 12,718,190,834.02
  5. Step 5: Solve for x
    x = 12,718,190,834.02/118,540.61
  6. Step 6: Final answer
    x = 107,289.74

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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.