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Finding the Fourth Proportional to 138,988.44, 191,706.30 and 85,299.48

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Solution

The fourth proportional to 138,988.44, 191,706.30 and 85,299.48 is: 117,653.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,988.44 : 191,706.30 = 85,299.48 : x
  2. Step 2: Convert to fraction form
    138,988.44/191,706.30 = 85,299.48/x
  3. Step 3: Cross multiply
    138,988.44x = 191,706.30 × 85,299.48
  4. Step 4: Simplify right side
    138,988.44x = 16,352,447,702.72
  5. Step 5: Solve for x
    x = 16,352,447,702.72/138,988.44
  6. Step 6: Final answer
    x = 117,653.29

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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.