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Finding the Fourth Proportional to 78,763.60, 118,152.76 and 31,367.26

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Solution

The fourth proportional to 78,763.60, 118,152.76 and 31,367.26 is: 47,053.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,763.60 : 118,152.76 = 31,367.26 : x
  2. Step 2: Convert to fraction form
    78,763.60/118,152.76 = 31,367.26/x
  3. Step 3: Cross multiply
    78,763.60x = 118,152.76 × 31,367.26
  4. Step 4: Simplify right side
    78,763.60x = 3,706,128,342.64
  5. Step 5: Solve for x
    x = 3,706,128,342.64/78,763.60
  6. Step 6: Final answer
    x = 47,053.82

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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.