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Finding the Fourth Proportional to 72,756.65, 108,492.45 and 63,908.21

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Solution

The fourth proportional to 72,756.65, 108,492.45 and 63,908.21 is: 95,297.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,756.65 : 108,492.45 = 63,908.21 : x
  2. Step 2: Convert to fraction form
    72,756.65/108,492.45 = 63,908.21/x
  3. Step 3: Cross multiply
    72,756.65x = 108,492.45 × 63,908.21
  4. Step 4: Simplify right side
    72,756.65x = 6,933,558,278.01
  5. Step 5: Solve for x
    x = 6,933,558,278.01/72,756.65
  6. Step 6: Final answer
    x = 95,297.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.