Home / 75,428.70-113,141.28-37,978.72

Finding the Fourth Proportional to 75,428.70, 113,141.28 and 37,978.72

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Solution

The fourth proportional to 75,428.70, 113,141.28 and 37,978.72 is: 56,967.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,428.70 : 113,141.28 = 37,978.72 : x
  2. Step 2: Convert to fraction form
    75,428.70/113,141.28 = 37,978.72/x
  3. Step 3: Cross multiply
    75,428.70x = 113,141.28 × 37,978.72
  4. Step 4: Simplify right side
    75,428.70x = 4,296,960,427.86
  5. Step 5: Solve for x
    x = 4,296,960,427.86/75,428.70
  6. Step 6: Final answer
    x = 56,967.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.