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Finding the Fourth Proportional to 92,789.40, 128,048.40 and 50,348.10

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Solution

The fourth proportional to 92,789.40, 128,048.40 and 50,348.10 is: 69,479.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,789.40 : 128,048.40 = 50,348.10 : x
  2. Step 2: Convert to fraction form
    92,789.40/128,048.40 = 50,348.10/x
  3. Step 3: Cross multiply
    92,789.40x = 128,048.40 × 50,348.10
  4. Step 4: Simplify right side
    92,789.40x = 6,446,993,648.04
  5. Step 5: Solve for x
    x = 6,446,993,648.04/92,789.40
  6. Step 6: Final answer
    x = 69,479.85

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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.