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Finding the Fourth Proportional to 78,107.99, 117,143.69 and 21,953.48

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Solution

The fourth proportional to 78,107.99, 117,143.69 and 21,953.48 is: 32,925.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,107.99 : 117,143.69 = 21,953.48 : x
  2. Step 2: Convert to fraction form
    78,107.99/117,143.69 = 21,953.48/x
  3. Step 3: Cross multiply
    78,107.99x = 117,143.69 × 21,953.48
  4. Step 4: Simplify right side
    78,107.99x = 2,571,710,960.06
  5. Step 5: Solve for x
    x = 2,571,710,960.06/78,107.99
  6. Step 6: Final answer
    x = 32,925.07

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1.5x scale

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.