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Finding the Fourth Proportional to 85,316.36, 127,919.85 and 35,430.89

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Solution

The fourth proportional to 85,316.36, 127,919.85 and 35,430.89 is: 53,123.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,316.36 : 127,919.85 = 35,430.89 : x
  2. Step 2: Convert to fraction form
    85,316.36/127,919.85 = 35,430.89/x
  3. Step 3: Cross multiply
    85,316.36x = 127,919.85 × 35,430.89
  4. Step 4: Simplify right side
    85,316.36x = 4,532,313,494.57
  5. Step 5: Solve for x
    x = 4,532,313,494.57/85,316.36
  6. Step 6: Final answer
    x = 53,123.62

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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.