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Finding the Fourth Proportional to 85,800.98, 128,624.92 and 43,657.49

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Solution

The fourth proportional to 85,800.98, 128,624.92 and 43,657.49 is: 65,447.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,800.98 : 128,624.92 = 43,657.49 : x
  2. Step 2: Convert to fraction form
    85,800.98/128,624.92 = 43,657.49/x
  3. Step 3: Cross multiply
    85,800.98x = 128,624.92 × 43,657.49
  4. Step 4: Simplify right side
    85,800.98x = 5,615,441,158.65
  5. Step 5: Solve for x
    x = 5,615,441,158.65/85,800.98
  6. Step 6: Final answer
    x = 65,447.28

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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.