Home / 74,420.18-102,699.44-40,428.40

Finding the Fourth Proportional to 74,420.18, 102,699.44 and 40,428.40

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Solution

The fourth proportional to 74,420.18, 102,699.44 and 40,428.40 is: 55,790.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,420.18 : 102,699.44 = 40,428.40 : x
  2. Step 2: Convert to fraction form
    74,420.18/102,699.44 = 40,428.40/x
  3. Step 3: Cross multiply
    74,420.18x = 102,699.44 × 40,428.40
  4. Step 4: Simplify right side
    74,420.18x = 4,151,974,152.78
  5. Step 5: Solve for x
    x = 4,151,974,152.78/74,420.18
  6. Step 6: Final answer
    x = 55,790.97

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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.