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Finding the Fourth Proportional to 78,755.96, 118,153.90 and 26,165.72

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Solution

The fourth proportional to 78,755.96, 118,153.90 and 26,165.72 is: 39,255.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,755.96 : 118,153.90 = 26,165.72 : x
  2. Step 2: Convert to fraction form
    78,755.96/118,153.90 = 26,165.72/x
  3. Step 3: Cross multiply
    78,755.96x = 118,153.90 × 26,165.72
  4. Step 4: Simplify right side
    78,755.96x = 3,091,581,864.31
  5. Step 5: Solve for x
    x = 3,091,581,864.31/78,755.96
  6. Step 6: Final answer
    x = 39,255.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.