Home / 77,434.98-116,138.62-20,509.29

Finding the Fourth Proportional to 77,434.98, 116,138.62 and 20,509.29

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Solution

The fourth proportional to 77,434.98, 116,138.62 and 20,509.29 is: 30,760.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,434.98 : 116,138.62 = 20,509.29 : x
  2. Step 2: Convert to fraction form
    77,434.98/116,138.62 = 20,509.29/x
  3. Step 3: Cross multiply
    77,434.98x = 116,138.62 × 20,509.29
  4. Step 4: Simplify right side
    77,434.98x = 2,381,920,637.78
  5. Step 5: Solve for x
    x = 2,381,920,637.78/77,434.98
  6. Step 6: Final answer
    x = 30,760.27

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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.