Home / 77,320.98-115,981.99-21,159.83

Finding the Fourth Proportional to 77,320.98, 115,981.99 and 21,159.83

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Solution

The fourth proportional to 77,320.98, 115,981.99 and 21,159.83 is: 31,739.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,320.98 : 115,981.99 = 21,159.83 : x
  2. Step 2: Convert to fraction form
    77,320.98/115,981.99 = 21,159.83/x
  3. Step 3: Cross multiply
    77,320.98x = 115,981.99 × 21,159.83
  4. Step 4: Simplify right side
    77,320.98x = 2,454,159,428.52
  5. Step 5: Solve for x
    x = 2,454,159,428.52/77,320.98
  6. Step 6: Final answer
    x = 31,739.89

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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.