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Finding the Fourth Proportional to 144,718.92, 199,720.08 and 81,065.88

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Solution

The fourth proportional to 144,718.92, 199,720.08 and 81,065.88 is: 111,875.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,718.92 : 199,720.08 = 81,065.88 : x
  2. Step 2: Convert to fraction form
    144,718.92/199,720.08 = 81,065.88/x
  3. Step 3: Cross multiply
    144,718.92x = 199,720.08 × 81,065.88
  4. Step 4: Simplify right side
    144,718.92x = 16,190,484,038.87
  5. Step 5: Solve for x
    x = 16,190,484,038.87/144,718.92
  6. Step 6: Final answer
    x = 111,875.38

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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.