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Finding the Fourth Proportional to 76,361.87, 105,385.17 and 42,376.80

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Solution

The fourth proportional to 76,361.87, 105,385.17 and 42,376.80 is: 58,483.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,361.87 : 105,385.17 = 42,376.80 : x
  2. Step 2: Convert to fraction form
    76,361.87/105,385.17 = 42,376.80/x
  3. Step 3: Cross multiply
    76,361.87x = 105,385.17 × 42,376.80
  4. Step 4: Simplify right side
    76,361.87x = 4,465,886,272.06
  5. Step 5: Solve for x
    x = 4,465,886,272.06/76,361.87
  6. Step 6: Final answer
    x = 58,483.20

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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.