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Finding the Fourth Proportional to 63,709.60, 87,687.12 and 56,106.22

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Solution

The fourth proportional to 63,709.60, 87,687.12 and 56,106.22 is: 77,222.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,709.60 : 87,687.12 = 56,106.22 : x
  2. Step 2: Convert to fraction form
    63,709.60/87,687.12 = 56,106.22/x
  3. Step 3: Cross multiply
    63,709.60x = 87,687.12 × 56,106.22
  4. Step 4: Simplify right side
    63,709.60x = 4,919,792,845.89
  5. Step 5: Solve for x
    x = 4,919,792,845.89/63,709.60
  6. Step 6: Final answer
    x = 77,222.16

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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.