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Finding the Fourth Proportional to 77,655.74, 107,139.14 and 63,290.87

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Solution

The fourth proportional to 77,655.74, 107,139.14 and 63,290.87 is: 87,320.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,655.74 : 107,139.14 = 63,290.87 : x
  2. Step 2: Convert to fraction form
    77,655.74/107,139.14 = 63,290.87/x
  3. Step 3: Cross multiply
    77,655.74x = 107,139.14 × 63,290.87
  4. Step 4: Simplify right side
    77,655.74x = 6,780,928,845.96
  5. Step 5: Solve for x
    x = 6,780,928,845.96/77,655.74
  6. Step 6: Final answer
    x = 87,320.39

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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.