Home / 66,278.34-99,424.39-21,288.32

Finding the Fourth Proportional to 66,278.34, 99,424.39 and 21,288.32

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Solution

The fourth proportional to 66,278.34, 99,424.39 and 21,288.32 is: 31,934.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,278.34 : 99,424.39 = 21,288.32 : x
  2. Step 2: Convert to fraction form
    66,278.34/99,424.39 = 21,288.32/x
  3. Step 3: Cross multiply
    66,278.34x = 99,424.39 × 21,288.32
  4. Step 4: Simplify right side
    66,278.34x = 2,116,578,230.12
  5. Step 5: Solve for x
    x = 2,116,578,230.12/66,278.34
  6. Step 6: Final answer
    x = 31,934.69

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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.