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Finding the Fourth Proportional to 85,518.16, 128,279.16 and 29,357.84

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Solution

The fourth proportional to 85,518.16, 128,279.16 and 29,357.84 is: 44,037.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,518.16 : 128,279.16 = 29,357.84 : x
  2. Step 2: Convert to fraction form
    85,518.16/128,279.16 = 29,357.84/x
  3. Step 3: Cross multiply
    85,518.16x = 128,279.16 × 29,357.84
  4. Step 4: Simplify right side
    85,518.16x = 3,765,999,054.61
  5. Step 5: Solve for x
    x = 3,765,999,054.61/85,518.16
  6. Step 6: Final answer
    x = 44,037.42

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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.