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Finding the Fourth Proportional to 85,888.64, 128,841.78 and 29,728.65

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Solution

The fourth proportional to 85,888.64, 128,841.78 and 29,728.65 is: 44,596.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,888.64 : 128,841.78 = 29,728.65 : x
  2. Step 2: Convert to fraction form
    85,888.64/128,841.78 = 29,728.65/x
  3. Step 3: Cross multiply
    85,888.64x = 128,841.78 × 29,728.65
  4. Step 4: Simplify right side
    85,888.64x = 3,830,292,183.00
  5. Step 5: Solve for x
    x = 3,830,292,183.00/85,888.64
  6. Step 6: Final answer
    x = 44,596.03

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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.