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Finding the Fourth Proportional to 108,457.65, 149,544.09 and 86,930.15

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Solution

The fourth proportional to 108,457.65, 149,544.09 and 86,930.15 is: 119,861.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,457.65 : 149,544.09 = 86,930.15 : x
  2. Step 2: Convert to fraction form
    108,457.65/149,544.09 = 86,930.15/x
  3. Step 3: Cross multiply
    108,457.65x = 149,544.09 × 86,930.15
  4. Step 4: Simplify right side
    108,457.65x = 12,999,889,427.59
  5. Step 5: Solve for x
    x = 12,999,889,427.59/108,457.65
  6. Step 6: Final answer
    x = 119,861.43

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1.5x scale

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.