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Finding the Fourth Proportional to 88,145.40, 121,641.60 and 47,859.60

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Solution

The fourth proportional to 88,145.40, 121,641.60 and 47,859.60 is: 66,046.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,145.40 : 121,641.60 = 47,859.60 : x
  2. Step 2: Convert to fraction form
    88,145.40/121,641.60 = 47,859.60/x
  3. Step 3: Cross multiply
    88,145.40x = 121,641.60 × 47,859.60
  4. Step 4: Simplify right side
    88,145.40x = 5,821,718,319.36
  5. Step 5: Solve for x
    x = 5,821,718,319.36/88,145.40
  6. Step 6: Final answer
    x = 66,046.76

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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.