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Finding the Fourth Proportional to 153,676.98, 212,066.10 and 85,700.97

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Solution

The fourth proportional to 153,676.98, 212,066.10 and 85,700.97 is: 118,262.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,676.98 : 212,066.10 = 85,700.97 : x
  2. Step 2: Convert to fraction form
    153,676.98/212,066.10 = 85,700.97/x
  3. Step 3: Cross multiply
    153,676.98x = 212,066.10 × 85,700.97
  4. Step 4: Simplify right side
    153,676.98x = 18,174,270,474.12
  5. Step 5: Solve for x
    x = 18,174,270,474.12/153,676.98
  6. Step 6: Final answer
    x = 118,262.80

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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.