Home / 133,985.10-200,686.05-81,302.70

Finding the Fourth Proportional to 133,985.10, 200,686.05 and 81,302.70

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Solution

The fourth proportional to 133,985.10, 200,686.05 and 81,302.70 is: 121,777.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,985.10 : 200,686.05 = 81,302.70 : x
  2. Step 2: Convert to fraction form
    133,985.10/200,686.05 = 81,302.70/x
  3. Step 3: Cross multiply
    133,985.10x = 200,686.05 × 81,302.70
  4. Step 4: Simplify right side
    133,985.10x = 16,316,317,717.34
  5. Step 5: Solve for x
    x = 16,316,317,717.34/133,985.10
  6. Step 6: Final answer
    x = 121,777.11

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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.