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Finding the Fourth Proportional to 78,927.96, 118,379.16 and 28,995.78

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Solution

The fourth proportional to 78,927.96, 118,379.16 and 28,995.78 is: 43,488.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,927.96 : 118,379.16 = 28,995.78 : x
  2. Step 2: Convert to fraction form
    78,927.96/118,379.16 = 28,995.78/x
  3. Step 3: Cross multiply
    78,927.96x = 118,379.16 × 28,995.78
  4. Step 4: Simplify right side
    78,927.96x = 3,432,496,079.94
  5. Step 5: Solve for x
    x = 3,432,496,079.94/78,927.96
  6. Step 6: Final answer
    x = 43,488.98

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1.5x scale

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.