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Finding the Fourth Proportional to 85,864.74, 128,630.32 and 48,310.30

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Solution

The fourth proportional to 85,864.74, 128,630.32 and 48,310.30 is: 72,371.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,864.74 : 128,630.32 = 48,310.30 : x
  2. Step 2: Convert to fraction form
    85,864.74/128,630.32 = 48,310.30/x
  3. Step 3: Cross multiply
    85,864.74x = 128,630.32 × 48,310.30
  4. Step 4: Simplify right side
    85,864.74x = 6,214,169,348.30
  5. Step 5: Solve for x
    x = 6,214,169,348.30/85,864.74
  6. Step 6: Final answer
    x = 72,371.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.