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Finding the Fourth Proportional to 147,043.40, 202,911.48 and 81,628.87

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Solution

The fourth proportional to 147,043.40, 202,911.48 and 81,628.87 is: 112,643.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,043.40 : 202,911.48 = 81,628.87 : x
  2. Step 2: Convert to fraction form
    147,043.40/202,911.48 = 81,628.87/x
  3. Step 3: Cross multiply
    147,043.40x = 202,911.48 × 81,628.87
  4. Step 4: Simplify right side
    147,043.40x = 16,563,434,822.43
  5. Step 5: Solve for x
    x = 16,563,434,822.43/147,043.40
  6. Step 6: Final answer
    x = 112,643.17

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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.