Home / 78,137.04-107,891.28-72,166.32

Finding the Fourth Proportional to 78,137.04, 107,891.28 and 72,166.32

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Solution

The fourth proportional to 78,137.04, 107,891.28 and 72,166.32 is: 99,646.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,137.04 : 107,891.28 = 72,166.32 : x
  2. Step 2: Convert to fraction form
    78,137.04/107,891.28 = 72,166.32/x
  3. Step 3: Cross multiply
    78,137.04x = 107,891.28 × 72,166.32
  4. Step 4: Simplify right side
    78,137.04x = 7,786,116,637.69
  5. Step 5: Solve for x
    x = 7,786,116,637.69/78,137.04
  6. Step 6: Final answer
    x = 99,646.94

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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.