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Finding the Fourth Proportional to 78,802.17, 108,645.91 and 57,274.19

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Solution

The fourth proportional to 78,802.17, 108,645.91 and 57,274.19 is: 78,964.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,802.17 : 108,645.91 = 57,274.19 : x
  2. Step 2: Convert to fraction form
    78,802.17/108,645.91 = 57,274.19/x
  3. Step 3: Cross multiply
    78,802.17x = 108,645.91 × 57,274.19
  4. Step 4: Simplify right side
    78,802.17x = 6,222,606,213.07
  5. Step 5: Solve for x
    x = 6,222,606,213.07/78,802.17
  6. Step 6: Final answer
    x = 78,964.91

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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.