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Finding the Fourth Proportional to 139,506.90, 192,520.29 and 82,148.70

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Solution

The fourth proportional to 139,506.90, 192,520.29 and 82,148.70 is: 113,365.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,506.90 : 192,520.29 = 82,148.70 : x
  2. Step 2: Convert to fraction form
    139,506.90/192,520.29 = 82,148.70/x
  3. Step 3: Cross multiply
    139,506.90x = 192,520.29 × 82,148.70
  4. Step 4: Simplify right side
    139,506.90x = 15,815,291,547.12
  5. Step 5: Solve for x
    x = 15,815,291,547.12/139,506.90
  6. Step 6: Final answer
    x = 113,365.66

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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.