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Finding the Fourth Proportional to 85,858.34, 128,861.62 and 59,581.53

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Solution

The fourth proportional to 85,858.34, 128,861.62 and 59,581.53 is: 89,423.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,858.34 : 128,861.62 = 59,581.53 : x
  2. Step 2: Convert to fraction form
    85,858.34/128,861.62 = 59,581.53/x
  3. Step 3: Cross multiply
    85,858.34x = 128,861.62 × 59,581.53
  4. Step 4: Simplify right side
    85,858.34x = 7,677,772,328.92
  5. Step 5: Solve for x
    x = 7,677,772,328.92/85,858.34
  6. Step 6: Final answer
    x = 89,423.73

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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.