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Finding the Fourth Proportional to 74,642.91, 102,999.60 and 45,958.02

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Solution

The fourth proportional to 74,642.91, 102,999.60 and 45,958.02 is: 63,417.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,642.91 : 102,999.60 = 45,958.02 : x
  2. Step 2: Convert to fraction form
    74,642.91/102,999.60 = 45,958.02/x
  3. Step 3: Cross multiply
    74,642.91x = 102,999.60 × 45,958.02
  4. Step 4: Simplify right side
    74,642.91x = 4,733,657,676.79
  5. Step 5: Solve for x
    x = 4,733,657,676.79/74,642.91
  6. Step 6: Final answer
    x = 63,417.38

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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.