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Finding the Fourth Proportional to 76,895.80, 105,958.74 and 56,720.74

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Solution

The fourth proportional to 76,895.80, 105,958.74 and 56,720.74 is: 78,158.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,895.80 : 105,958.74 = 56,720.74 : x
  2. Step 2: Convert to fraction form
    76,895.80/105,958.74 = 56,720.74/x
  3. Step 3: Cross multiply
    76,895.80x = 105,958.74 × 56,720.74
  4. Step 4: Simplify right side
    76,895.80x = 6,010,058,142.27
  5. Step 5: Solve for x
    x = 6,010,058,142.27/76,895.80
  6. Step 6: Final answer
    x = 78,158.47

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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.