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Finding the Fourth Proportional to 78,988.50, 118,495.71 and 26,410.59

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Solution

The fourth proportional to 78,988.50, 118,495.71 and 26,410.59 is: 39,620.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,988.50 : 118,495.71 = 26,410.59 : x
  2. Step 2: Convert to fraction form
    78,988.50/118,495.71 = 26,410.59/x
  3. Step 3: Cross multiply
    78,988.50x = 118,495.71 × 26,410.59
  4. Step 4: Simplify right side
    78,988.50x = 3,129,541,613.57
  5. Step 5: Solve for x
    x = 3,129,541,613.57/78,988.50
  6. Step 6: Final answer
    x = 39,620.22

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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.