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Finding the Fourth Proportional to 78,690.38, 108,589.31 and 44,698.76

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Solution

The fourth proportional to 78,690.38, 108,589.31 and 44,698.76 is: 61,682.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,690.38 : 108,589.31 = 44,698.76 : x
  2. Step 2: Convert to fraction form
    78,690.38/108,589.31 = 44,698.76/x
  3. Step 3: Cross multiply
    78,690.38x = 108,589.31 × 44,698.76
  4. Step 4: Simplify right side
    78,690.38x = 4,853,807,506.26
  5. Step 5: Solve for x
    x = 4,853,807,506.26/78,690.38
  6. Step 6: Final answer
    x = 61,682.35

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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.