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Finding the Fourth Proportional to 115,947.40, 173,661.90 and 113,355.40

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Solution

The fourth proportional to 115,947.40, 173,661.90 and 113,355.40 is: 169,779.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,947.40 : 173,661.90 = 113,355.40 : x
  2. Step 2: Convert to fraction form
    115,947.40/173,661.90 = 113,355.40/x
  3. Step 3: Cross multiply
    115,947.40x = 173,661.90 × 113,355.40
  4. Step 4: Simplify right side
    115,947.40x = 19,685,514,139.26
  5. Step 5: Solve for x
    x = 19,685,514,139.26/115,947.40
  6. Step 6: Final answer
    x = 169,779.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.