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Finding the Fourth Proportional to 101,031.26, 139,351.04 and 85,818.38

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Solution

The fourth proportional to 101,031.26, 139,351.04 and 85,818.38 is: 118,368.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,031.26 : 139,351.04 = 85,818.38 : x
  2. Step 2: Convert to fraction form
    101,031.26/139,351.04 = 85,818.38/x
  3. Step 3: Cross multiply
    101,031.26x = 139,351.04 × 85,818.38
  4. Step 4: Simplify right side
    101,031.26x = 11,958,880,504.12
  5. Step 5: Solve for x
    x = 11,958,880,504.12/101,031.26
  6. Step 6: Final answer
    x = 118,368.12

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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.