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Finding the Fourth Proportional to 122,402.93, 168,872.72 and 79,986.06

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Solution

The fourth proportional to 122,402.93, 168,872.72 and 79,986.06 is: 110,352.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,402.93 : 168,872.72 = 79,986.06 : x
  2. Step 2: Convert to fraction form
    122,402.93/168,872.72 = 79,986.06/x
  3. Step 3: Cross multiply
    122,402.93x = 168,872.72 × 79,986.06
  4. Step 4: Simplify right side
    122,402.93x = 13,507,463,714.25
  5. Step 5: Solve for x
    x = 13,507,463,714.25/122,402.93
  6. Step 6: Final answer
    x = 110,352.46

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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.