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Finding the Fourth Proportional to 85,925.98, 128,883.84 and 51,087.34

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Solution

The fourth proportional to 85,925.98, 128,883.84 and 51,087.34 is: 76,627.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,925.98 : 128,883.84 = 51,087.34 : x
  2. Step 2: Convert to fraction form
    85,925.98/128,883.84 = 51,087.34/x
  3. Step 3: Cross multiply
    85,925.98x = 128,883.84 × 51,087.34
  4. Step 4: Simplify right side
    85,925.98x = 6,584,332,554.59
  5. Step 5: Solve for x
    x = 6,584,332,554.59/85,925.98
  6. Step 6: Final answer
    x = 76,627.96

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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.