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Finding the Fourth Proportional to 118,682.88, 163,960.38 and 77,943.66

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Solution

The fourth proportional to 118,682.88, 163,960.38 and 77,943.66 is: 107,679.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,682.88 : 163,960.38 = 77,943.66 : x
  2. Step 2: Convert to fraction form
    118,682.88/163,960.38 = 77,943.66/x
  3. Step 3: Cross multiply
    118,682.88x = 163,960.38 × 77,943.66
  4. Step 4: Simplify right side
    118,682.88x = 12,779,672,112.19
  5. Step 5: Solve for x
    x = 12,779,672,112.19/118,682.88
  6. Step 6: Final answer
    x = 107,679.15

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1.5x scale

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.