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Finding the Fourth Proportional to 63,878.40, 95,731.20 and 42,758.40

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Solution

The fourth proportional to 63,878.40, 95,731.20 and 42,758.40 is: 64,079.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,878.40 : 95,731.20 = 42,758.40 : x
  2. Step 2: Convert to fraction form
    63,878.40/95,731.20 = 42,758.40/x
  3. Step 3: Cross multiply
    63,878.40x = 95,731.20 × 42,758.40
  4. Step 4: Simplify right side
    63,878.40x = 4,093,312,942.08
  5. Step 5: Solve for x
    x = 4,093,312,942.08/63,878.40
  6. Step 6: Final answer
    x = 64,079.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.