Home / 74,421.96-102,699.66-40,429.20

Finding the Fourth Proportional to 74,421.96, 102,699.66 and 40,429.20

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Solution

The fourth proportional to 74,421.96, 102,699.66 and 40,429.20 is: 55,790.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,421.96 : 102,699.66 = 40,429.20 : x
  2. Step 2: Convert to fraction form
    74,421.96/102,699.66 = 40,429.20/x
  3. Step 3: Cross multiply
    74,421.96x = 102,699.66 × 40,429.20
  4. Step 4: Simplify right side
    74,421.96x = 4,152,065,094.07
  5. Step 5: Solve for x
    x = 4,152,065,094.07/74,421.96
  6. Step 6: Final answer
    x = 55,790.86

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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.