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Finding the Fourth Proportional to 78,763.59, 118,110.15 and 28,807.65

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Solution

The fourth proportional to 78,763.59, 118,110.15 and 28,807.65 is: 43,198.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,763.59 : 118,110.15 = 28,807.65 : x
  2. Step 2: Convert to fraction form
    78,763.59/118,110.15 = 28,807.65/x
  3. Step 3: Cross multiply
    78,763.59x = 118,110.15 × 28,807.65
  4. Step 4: Simplify right side
    78,763.59x = 3,402,475,862.65
  5. Step 5: Solve for x
    x = 3,402,475,862.65/78,763.59
  6. Step 6: Final answer
    x = 43,198.59

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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.