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Finding the Fourth Proportional to 107,299.88, 148,039.60 and 61,971.92

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Solution

The fourth proportional to 107,299.88, 148,039.60 and 61,971.92 is: 85,501.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,299.88 : 148,039.60 = 61,971.92 : x
  2. Step 2: Convert to fraction form
    107,299.88/148,039.60 = 61,971.92/x
  3. Step 3: Cross multiply
    107,299.88x = 148,039.60 × 61,971.92
  4. Step 4: Simplify right side
    107,299.88x = 9,174,298,248.03
  5. Step 5: Solve for x
    x = 9,174,298,248.03/107,299.88
  6. Step 6: Final answer
    x = 85,501.48

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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.