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Finding the Fourth Proportional to 85,786.98, 128,648.88 and 29,612.76

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Solution

The fourth proportional to 85,786.98, 128,648.88 and 29,612.76 is: 44,408.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,786.98 : 128,648.88 = 29,612.76 : x
  2. Step 2: Convert to fraction form
    85,786.98/128,648.88 = 29,612.76/x
  3. Step 3: Cross multiply
    85,786.98x = 128,648.88 × 29,612.76
  4. Step 4: Simplify right side
    85,786.98x = 3,809,648,407.71
  5. Step 5: Solve for x
    x = 3,809,648,407.71/85,786.98
  6. Step 6: Final answer
    x = 44,408.24

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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.