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Finding the Fourth Proportional to 78,681.80, 108,620.26 and 50,030.28

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Solution

The fourth proportional to 78,681.80, 108,620.26 and 50,030.28 is: 69,066.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,681.80 : 108,620.26 = 50,030.28 : x
  2. Step 2: Convert to fraction form
    78,681.80/108,620.26 = 50,030.28/x
  3. Step 3: Cross multiply
    78,681.80x = 108,620.26 × 50,030.28
  4. Step 4: Simplify right side
    78,681.80x = 5,434,302,021.47
  5. Step 5: Solve for x
    x = 5,434,302,021.47/78,681.80
  6. Step 6: Final answer
    x = 69,066.82

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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.