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Finding the Fourth Proportional to 78,673.05, 108,706.91 and 62,887.77

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Solution

The fourth proportional to 78,673.05, 108,706.91 and 62,887.77 is: 86,895.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,673.05 : 108,706.91 = 62,887.77 : x
  2. Step 2: Convert to fraction form
    78,673.05/108,706.91 = 62,887.77/x
  3. Step 3: Cross multiply
    78,673.05x = 108,706.91 × 62,887.77
  4. Step 4: Simplify right side
    78,673.05x = 6,836,334,839.05
  5. Step 5: Solve for x
    x = 6,836,334,839.05/78,673.05
  6. Step 6: Final answer
    x = 86,895.51

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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.