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Finding the Fourth Proportional to 78,880.82, 108,855.73 and 43,070.90

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Solution

The fourth proportional to 78,880.82, 108,855.73 and 43,070.90 is: 59,437.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,880.82 : 108,855.73 = 43,070.90 : x
  2. Step 2: Convert to fraction form
    78,880.82/108,855.73 = 43,070.90/x
  3. Step 3: Cross multiply
    78,880.82x = 108,855.73 × 43,070.90
  4. Step 4: Simplify right side
    78,880.82x = 4,688,514,261.26
  5. Step 5: Solve for x
    x = 4,688,514,261.26/78,880.82
  6. Step 6: Final answer
    x = 59,437.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.