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Finding the Fourth Proportional to 93,861.72, 129,544.02 and 61,689.60

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Solution

The fourth proportional to 93,861.72, 129,544.02 and 61,689.60 is: 85,141.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,861.72 : 129,544.02 = 61,689.60 : x
  2. Step 2: Convert to fraction form
    93,861.72/129,544.02 = 61,689.60/x
  3. Step 3: Cross multiply
    93,861.72x = 129,544.02 × 61,689.60
  4. Step 4: Simplify right side
    93,861.72x = 7,991,518,776.19
  5. Step 5: Solve for x
    x = 7,991,518,776.19/93,861.72
  6. Step 6: Final answer
    x = 85,141.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.