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Finding the Fourth Proportional to 118,418.50, 163,490.43 and 76,051.72

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Solution

The fourth proportional to 118,418.50, 163,490.43 and 76,051.72 is: 104,998.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,418.50 : 163,490.43 = 76,051.72 : x
  2. Step 2: Convert to fraction form
    118,418.50/163,490.43 = 76,051.72/x
  3. Step 3: Cross multiply
    118,418.50x = 163,490.43 × 76,051.72
  4. Step 4: Simplify right side
    118,418.50x = 12,433,728,405.04
  5. Step 5: Solve for x
    x = 12,433,728,405.04/118,418.50
  6. Step 6: Final answer
    x = 104,998.19

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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.