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Finding the Fourth Proportional to 134,051.80, 200,904.90 and 81,405.40

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Solution

The fourth proportional to 134,051.80, 200,904.90 and 81,405.40 is: 122,003.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,051.80 : 200,904.90 = 81,405.40 : x
  2. Step 2: Convert to fraction form
    134,051.80/200,904.90 = 81,405.40/x
  3. Step 3: Cross multiply
    134,051.80x = 200,904.90 × 81,405.40
  4. Step 4: Simplify right side
    134,051.80x = 16,354,743,746.46
  5. Step 5: Solve for x
    x = 16,354,743,746.46/134,051.80
  6. Step 6: Final answer
    x = 122,003.16

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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.