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Finding the Fourth Proportional to 85,648.59, 128,619.90 and 52,562.93

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Solution

The fourth proportional to 85,648.59, 128,619.90 and 52,562.93 is: 78,934.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,648.59 : 128,619.90 = 52,562.93 : x
  2. Step 2: Convert to fraction form
    85,648.59/128,619.90 = 52,562.93/x
  3. Step 3: Cross multiply
    85,648.59x = 128,619.90 × 52,562.93
  4. Step 4: Simplify right side
    85,648.59x = 6,760,638,157.21
  5. Step 5: Solve for x
    x = 6,760,638,157.21/85,648.59
  6. Step 6: Final answer
    x = 78,934.61

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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.