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Finding the Fourth Proportional to 125,046.66, 172,580.81 and 71,319.36

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Solution

The fourth proportional to 125,046.66, 172,580.81 and 71,319.36 is: 98,430.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,046.66 : 172,580.81 = 71,319.36 : x
  2. Step 2: Convert to fraction form
    125,046.66/172,580.81 = 71,319.36/x
  3. Step 3: Cross multiply
    125,046.66x = 172,580.81 × 71,319.36
  4. Step 4: Simplify right side
    125,046.66x = 12,308,352,917.48
  5. Step 5: Solve for x
    x = 12,308,352,917.48/125,046.66
  6. Step 6: Final answer
    x = 98,430.08

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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.