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Finding the Fourth Proportional to 85,615.84, 128,424.63 and 38,233.34

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Solution

The fourth proportional to 85,615.84, 128,424.63 and 38,233.34 is: 57,350.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,615.84 : 128,424.63 = 38,233.34 : x
  2. Step 2: Convert to fraction form
    85,615.84/128,424.63 = 38,233.34/x
  3. Step 3: Cross multiply
    85,615.84x = 128,424.63 × 38,233.34
  4. Step 4: Simplify right side
    85,615.84x = 4,910,102,618.37
  5. Step 5: Solve for x
    x = 4,910,102,618.37/85,615.84
  6. Step 6: Final answer
    x = 57,350.40

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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.