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Finding the Fourth Proportional to 134,212.28, 185,139 and 85,064

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Solution

The fourth proportional to 134,212.28, 185,139 and 85,064 is: 117,341.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,212.28 : 185,139 = 85,064 : x
  2. Step 2: Convert to fraction form
    134,212.28/185,139 = 85,064/x
  3. Step 3: Cross multiply
    134,212.28x = 185,139 × 85,064
  4. Step 4: Simplify right side
    134,212.28x = 15,748,663,896
  5. Step 5: Solve for x
    x = 15,748,663,896/134,212.28
  6. Step 6: Final answer
    x = 117,341.45

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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.