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Finding the Fourth Proportional to 108,545.96, 149,718.64 and 76,348.87

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Solution

The fourth proportional to 108,545.96, 149,718.64 and 76,348.87 is: 105,308.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,545.96 : 149,718.64 = 76,348.87 : x
  2. Step 2: Convert to fraction form
    108,545.96/149,718.64 = 76,348.87/x
  3. Step 3: Cross multiply
    108,545.96x = 149,718.64 × 76,348.87
  4. Step 4: Simplify right side
    108,545.96x = 11,430,848,981.94
  5. Step 5: Solve for x
    x = 11,430,848,981.94/108,545.96
  6. Step 6: Final answer
    x = 105,308.84

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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.