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Finding the Fourth Proportional to 77,843.26, 107,430.20 and 43,858.40

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Solution

The fourth proportional to 77,843.26, 107,430.20 and 43,858.40 is: 60,528.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,843.26 : 107,430.20 = 43,858.40 : x
  2. Step 2: Convert to fraction form
    77,843.26/107,430.20 = 43,858.40/x
  3. Step 3: Cross multiply
    77,843.26x = 107,430.20 × 43,858.40
  4. Step 4: Simplify right side
    77,843.26x = 4,711,716,091.71
  5. Step 5: Solve for x
    x = 4,711,716,091.71/77,843.26
  6. Step 6: Final answer
    x = 60,528.25

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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.