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Finding the Fourth Proportional to 107,129.96, 147,830.06 and 61,189.37

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Solution

The fourth proportional to 107,129.96, 147,830.06 and 61,189.37 is: 84,436.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,129.96 : 147,830.06 = 61,189.37 : x
  2. Step 2: Convert to fraction form
    107,129.96/147,830.06 = 61,189.37/x
  3. Step 3: Cross multiply
    107,129.96x = 147,830.06 × 61,189.37
  4. Step 4: Simplify right side
    107,129.96x = 9,045,629,038.19
  5. Step 5: Solve for x
    x = 9,045,629,038.19/107,129.96
  6. Step 6: Final answer
    x = 84,436.04

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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.