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Finding the Fourth Proportional to 76,878.69, 115,278.12 and 29,479.77

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Solution

The fourth proportional to 76,878.69, 115,278.12 and 29,479.77 is: 44,204.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,878.69 : 115,278.12 = 29,479.77 : x
  2. Step 2: Convert to fraction form
    76,878.69/115,278.12 = 29,479.77/x
  3. Step 3: Cross multiply
    76,878.69x = 115,278.12 × 29,479.77
  4. Step 4: Simplify right side
    76,878.69x = 3,398,372,463.63
  5. Step 5: Solve for x
    x = 3,398,372,463.63/76,878.69
  6. Step 6: Final answer
    x = 44,204.35

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1.5x scale

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.