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Finding the Fourth Proportional to 105,409.92, 145,219.36 and 73,521.92

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Solution

The fourth proportional to 105,409.92, 145,219.36 and 73,521.92 is: 101,288.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,409.92 : 145,219.36 = 73,521.92 : x
  2. Step 2: Convert to fraction form
    105,409.92/145,219.36 = 73,521.92/x
  3. Step 3: Cross multiply
    105,409.92x = 145,219.36 × 73,521.92
  4. Step 4: Simplify right side
    105,409.92x = 10,676,806,168.37
  5. Step 5: Solve for x
    x = 10,676,806,168.37/105,409.92
  6. Step 6: Final answer
    x = 101,288.44

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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.