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Finding the Fourth Proportional to 133,130.85, 183,720.30 and 85,384.08

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Solution

The fourth proportional to 133,130.85, 183,720.30 and 85,384.08 is: 117,829.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,130.85 : 183,720.30 = 85,384.08 : x
  2. Step 2: Convert to fraction form
    133,130.85/183,720.30 = 85,384.08/x
  3. Step 3: Cross multiply
    133,130.85x = 183,720.30 × 85,384.08
  4. Step 4: Simplify right side
    133,130.85x = 15,686,788,792.82
  5. Step 5: Solve for x
    x = 15,686,788,792.82/133,130.85
  6. Step 6: Final answer
    x = 117,829.86

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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.