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Finding the Fourth Proportional to 80,776.68, 121,176.54 and 25,377

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Solution

The fourth proportional to 80,776.68, 121,176.54 and 25,377 is: 38,069.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,776.68 : 121,176.54 = 25,377 : x
  2. Step 2: Convert to fraction form
    80,776.68/121,176.54 = 25,377/x
  3. Step 3: Cross multiply
    80,776.68x = 121,176.54 × 25,377
  4. Step 4: Simplify right side
    80,776.68x = 3,075,097,055.58
  5. Step 5: Solve for x
    x = 3,075,097,055.58/80,776.68
  6. Step 6: Final answer
    x = 38,069.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.