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Finding the Fourth Proportional to 138,773.55, 191,512.13 and 85,048.19

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Solution

The fourth proportional to 138,773.55, 191,512.13 and 85,048.19 is: 117,369.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,773.55 : 191,512.13 = 85,048.19 : x
  2. Step 2: Convert to fraction form
    138,773.55/191,512.13 = 85,048.19/x
  3. Step 3: Cross multiply
    138,773.55x = 191,512.13 × 85,048.19
  4. Step 4: Simplify right side
    138,773.55x = 16,287,758,636.74
  5. Step 5: Solve for x
    x = 16,287,758,636.74/138,773.55
  6. Step 6: Final answer
    x = 117,369.33

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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.