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Finding the Fourth Proportional to 84,987.12, 117,280.56 and 47,260.56

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Solution

The fourth proportional to 84,987.12, 117,280.56 and 47,260.56 is: 65,218.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,987.12 : 117,280.56 = 47,260.56 : x
  2. Step 2: Convert to fraction form
    84,987.12/117,280.56 = 47,260.56/x
  3. Step 3: Cross multiply
    84,987.12x = 117,280.56 × 47,260.56
  4. Step 4: Simplify right side
    84,987.12x = 5,542,744,942.71
  5. Step 5: Solve for x
    x = 5,542,744,942.71/84,987.12
  6. Step 6: Final answer
    x = 65,218.65

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1.5x scale

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.