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Finding the Fourth Proportional to 123,808.11, 171,015.45 and 102,384.39

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Solution

The fourth proportional to 123,808.11, 171,015.45 and 102,384.39 is: 141,422.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,808.11 : 171,015.45 = 102,384.39 : x
  2. Step 2: Convert to fraction form
    123,808.11/171,015.45 = 102,384.39/x
  3. Step 3: Cross multiply
    123,808.11x = 171,015.45 × 102,384.39
  4. Step 4: Simplify right side
    123,808.11x = 17,509,312,528.83
  5. Step 5: Solve for x
    x = 17,509,312,528.83/123,808.11
  6. Step 6: Final answer
    x = 141,422.99

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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.