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Finding the Fourth Proportional to 78,736.71, 118,070.44 and 28,803.86

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Solution

The fourth proportional to 78,736.71, 118,070.44 and 28,803.86 is: 43,193.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,736.71 : 118,070.44 = 28,803.86 : x
  2. Step 2: Convert to fraction form
    78,736.71/118,070.44 = 28,803.86/x
  3. Step 3: Cross multiply
    78,736.71x = 118,070.44 × 28,803.86
  4. Step 4: Simplify right side
    78,736.71x = 3,400,884,423.90
  5. Step 5: Solve for x
    x = 3,400,884,423.90/78,736.71
  6. Step 6: Final answer
    x = 43,193.12

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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.