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Finding the Fourth Proportional to 108,428.81, 149,647.50 and 62,479.52

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Solution

The fourth proportional to 108,428.81, 149,647.50 and 62,479.52 is: 86,230.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,428.81 : 149,647.50 = 62,479.52 : x
  2. Step 2: Convert to fraction form
    108,428.81/149,647.50 = 62,479.52/x
  3. Step 3: Cross multiply
    108,428.81x = 149,647.50 × 62,479.52
  4. Step 4: Simplify right side
    108,428.81x = 9,349,903,220.96
  5. Step 5: Solve for x
    x = 9,349,903,220.96/108,428.81
  6. Step 6: Final answer
    x = 86,230.80

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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.