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Finding the Fourth Proportional to 76,173.77, 105,119.53 and 42,639.77

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Solution

The fourth proportional to 76,173.77, 105,119.53 and 42,639.77 is: 58,842.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,173.77 : 105,119.53 = 42,639.77 : x
  2. Step 2: Convert to fraction form
    76,173.77/105,119.53 = 42,639.77/x
  3. Step 3: Cross multiply
    76,173.77x = 105,119.53 × 42,639.77
  4. Step 4: Simplify right side
    76,173.77x = 4,482,272,737.91
  5. Step 5: Solve for x
    x = 4,482,272,737.91/76,173.77
  6. Step 6: Final answer
    x = 58,842.73

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1.5x scale

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.