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Finding the Fourth Proportional to 134,472.80, 201,709.20 and 81,984.80

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Solution

The fourth proportional to 134,472.80, 201,709.20 and 81,984.80 is: 122,977.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,472.80 : 201,709.20 = 81,984.80 : x
  2. Step 2: Convert to fraction form
    134,472.80/201,709.20 = 81,984.80/x
  3. Step 3: Cross multiply
    134,472.80x = 201,709.20 × 81,984.80
  4. Step 4: Simplify right side
    134,472.80x = 16,537,088,420.16
  5. Step 5: Solve for x
    x = 16,537,088,420.16/134,472.80
  6. Step 6: Final answer
    x = 122,977.20

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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.