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Finding the Fourth Proportional to 85,749.89, 128,624.83 and 35,802.79

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Solution

The fourth proportional to 85,749.89, 128,624.83 and 35,802.79 is: 53,704.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,749.89 : 128,624.83 = 35,802.79 : x
  2. Step 2: Convert to fraction form
    85,749.89/128,624.83 = 35,802.79/x
  3. Step 3: Cross multiply
    85,749.89x = 128,624.83 × 35,802.79
  4. Step 4: Simplify right side
    85,749.89x = 4,605,127,366.21
  5. Step 5: Solve for x
    x = 4,605,127,366.21/85,749.89
  6. Step 6: Final answer
    x = 53,704.18

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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.