Home / 76,485.20-105,520.08-56,389.84

Finding the Fourth Proportional to 76,485.20, 105,520.08 and 56,389.84

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Solution

The fourth proportional to 76,485.20, 105,520.08 and 56,389.84 is: 77,796.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,485.20 : 105,520.08 = 56,389.84 : x
  2. Step 2: Convert to fraction form
    76,485.20/105,520.08 = 56,389.84/x
  3. Step 3: Cross multiply
    76,485.20x = 105,520.08 × 56,389.84
  4. Step 4: Simplify right side
    76,485.20x = 5,950,260,427.99
  5. Step 5: Solve for x
    x = 5,950,260,427.99/76,485.20
  6. Step 6: Final answer
    x = 77,796.23

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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.