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Finding the Fourth Proportional to 133,126.59, 183,707.85 and 72,685.59

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Solution

The fourth proportional to 133,126.59, 183,707.85 and 72,685.59 is: 100,302.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,126.59 : 183,707.85 = 72,685.59 : x
  2. Step 2: Convert to fraction form
    133,126.59/183,707.85 = 72,685.59/x
  3. Step 3: Cross multiply
    133,126.59x = 183,707.85 × 72,685.59
  4. Step 4: Simplify right side
    133,126.59x = 13,352,913,464.88
  5. Step 5: Solve for x
    x = 13,352,913,464.88/133,126.59
  6. Step 6: Final answer
    x = 100,302.38

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1.5x scale

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.