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Finding the Fourth Proportional to 78,718.87, 118,095.17 and 28,798.77

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Solution

The fourth proportional to 78,718.87, 118,095.17 and 28,798.77 is: 43,204.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,718.87 : 118,095.17 = 28,798.77 : x
  2. Step 2: Convert to fraction form
    78,718.87/118,095.17 = 28,798.77/x
  3. Step 3: Cross multiply
    78,718.87x = 118,095.17 × 28,798.77
  4. Step 4: Simplify right side
    78,718.87x = 3,400,995,937.80
  5. Step 5: Solve for x
    x = 3,400,995,937.80/78,718.87
  6. Step 6: Final answer
    x = 43,204.33

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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.