Home / 77,139.19-115,774.53-30,424.87

Finding the Fourth Proportional to 77,139.19, 115,774.53 and 30,424.87

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Solution

The fourth proportional to 77,139.19, 115,774.53 and 30,424.87 is: 45,663.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,139.19 : 115,774.53 = 30,424.87 : x
  2. Step 2: Convert to fraction form
    77,139.19/115,774.53 = 30,424.87/x
  3. Step 3: Cross multiply
    77,139.19x = 115,774.53 × 30,424.87
  4. Step 4: Simplify right side
    77,139.19x = 3,522,425,024.56
  5. Step 5: Solve for x
    x = 3,522,425,024.56/77,139.19
  6. Step 6: Final answer
    x = 45,663.24

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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.