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Finding the Fourth Proportional to 77,687.59, 107,218.38 and 43,697.51

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Solution

The fourth proportional to 77,687.59, 107,218.38 and 43,697.51 is: 60,307.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,687.59 : 107,218.38 = 43,697.51 : x
  2. Step 2: Convert to fraction form
    77,687.59/107,218.38 = 43,697.51/x
  3. Step 3: Cross multiply
    77,687.59x = 107,218.38 × 43,697.51
  4. Step 4: Simplify right side
    77,687.59x = 4,685,176,262.08
  5. Step 5: Solve for x
    x = 4,685,176,262.08/77,687.59
  6. Step 6: Final answer
    x = 60,307.91

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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.