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Finding the Fourth Proportional to 108,715.88, 149,889.03 and 70,407.74

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Solution

The fourth proportional to 108,715.88, 149,889.03 and 70,407.74 is: 97,072.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,715.88 : 149,889.03 = 70,407.74 : x
  2. Step 2: Convert to fraction form
    108,715.88/149,889.03 = 70,407.74/x
  3. Step 3: Cross multiply
    108,715.88x = 149,889.03 × 70,407.74
  4. Step 4: Simplify right side
    108,715.88x = 10,553,347,853.09
  5. Step 5: Solve for x
    x = 10,553,347,853.09/108,715.88
  6. Step 6: Final answer
    x = 97,072.74

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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.