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Finding the Fourth Proportional to 137,130.40, 205,695.60 and 43,645.60

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Solution

The fourth proportional to 137,130.40, 205,695.60 and 43,645.60 is: 65,468.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,130.40 : 205,695.60 = 43,645.60 : x
  2. Step 2: Convert to fraction form
    137,130.40/205,695.60 = 43,645.60/x
  3. Step 3: Cross multiply
    137,130.40x = 205,695.60 × 43,645.60
  4. Step 4: Simplify right side
    137,130.40x = 8,977,707,879.36
  5. Step 5: Solve for x
    x = 8,977,707,879.36/137,130.40
  6. Step 6: Final answer
    x = 65,468.40

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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.