Home / 133,126.78-183,715.29-72,697.90

Finding the Fourth Proportional to 133,126.78, 183,715.29 and 72,697.90

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Solution

The fourth proportional to 133,126.78, 183,715.29 and 72,697.90 is: 100,323.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,126.78 : 183,715.29 = 72,697.90 : x
  2. Step 2: Convert to fraction form
    133,126.78/183,715.29 = 72,697.90/x
  3. Step 3: Cross multiply
    133,126.78x = 183,715.29 × 72,697.90
  4. Step 4: Simplify right side
    133,126.78x = 13,355,715,780.89
  5. Step 5: Solve for x
    x = 13,355,715,780.89/133,126.78
  6. Step 6: Final answer
    x = 100,323.28

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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.