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Finding the Fourth Proportional to 77,700.90, 107,236.72 and 43,710.80

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Solution

The fourth proportional to 77,700.90, 107,236.72 and 43,710.80 is: 60,326.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,700.90 : 107,236.72 = 43,710.80 : x
  2. Step 2: Convert to fraction form
    77,700.90/107,236.72 = 43,710.80/x
  3. Step 3: Cross multiply
    77,700.90x = 107,236.72 × 43,710.80
  4. Step 4: Simplify right side
    77,700.90x = 4,687,402,820.58
  5. Step 5: Solve for x
    x = 4,687,402,820.58/77,700.90
  6. Step 6: Final answer
    x = 60,326.24

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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.