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Finding the Fourth Proportional to 63,606.40, 87,819.60 and 56,870.56

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Solution

The fourth proportional to 63,606.40, 87,819.60 and 56,870.56 is: 78,519.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,606.40 : 87,819.60 = 56,870.56 : x
  2. Step 2: Convert to fraction form
    63,606.40/87,819.60 = 56,870.56/x
  3. Step 3: Cross multiply
    63,606.40x = 87,819.60 × 56,870.56
  4. Step 4: Simplify right side
    63,606.40x = 4,994,349,830.98
  5. Step 5: Solve for x
    x = 4,994,349,830.98/63,606.40
  6. Step 6: Final answer
    x = 78,519.61

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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.