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Finding the Fourth Proportional to 86,882.40, 119,916.24 and 66,518.64

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Solution

The fourth proportional to 86,882.40, 119,916.24 and 66,518.64 is: 91,809.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,882.40 : 119,916.24 = 66,518.64 : x
  2. Step 2: Convert to fraction form
    86,882.40/119,916.24 = 66,518.64/x
  3. Step 3: Cross multiply
    86,882.40x = 119,916.24 × 66,518.64
  4. Step 4: Simplify right side
    86,882.40x = 7,976,665,198.71
  5. Step 5: Solve for x
    x = 7,976,665,198.71/86,882.40
  6. Step 6: Final answer
    x = 91,809.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.