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Finding the Fourth Proportional to 77,681.88, 107,191.56 and 43,218.45

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Solution

The fourth proportional to 77,681.88, 107,191.56 and 43,218.45 is: 59,636.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,681.88 : 107,191.56 = 43,218.45 : x
  2. Step 2: Convert to fraction form
    77,681.88/107,191.56 = 43,218.45/x
  3. Step 3: Cross multiply
    77,681.88x = 107,191.56 × 43,218.45
  4. Step 4: Simplify right side
    77,681.88x = 4,632,653,076.28
  5. Step 5: Solve for x
    x = 4,632,653,076.28/77,681.88
  6. Step 6: Final answer
    x = 59,636.21

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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.