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Finding the Fourth Proportional to 78,662.93, 118,011.48 and 28,742.95

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Solution

The fourth proportional to 78,662.93, 118,011.48 and 28,742.95 is: 43,120.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,662.93 : 118,011.48 = 28,742.95 : x
  2. Step 2: Convert to fraction form
    78,662.93/118,011.48 = 28,742.95/x
  3. Step 3: Cross multiply
    78,662.93x = 118,011.48 × 28,742.95
  4. Step 4: Simplify right side
    78,662.93x = 3,391,997,444.98
  5. Step 5: Solve for x
    x = 3,391,997,444.98/78,662.93
  6. Step 6: Final answer
    x = 43,120.66

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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.