Home / 81,184.80-121,777.20-72,631.20

Finding the Fourth Proportional to 81,184.80, 121,777.20 and 72,631.20

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Solution

The fourth proportional to 81,184.80, 121,777.20 and 72,631.20 is: 108,946.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,184.80 : 121,777.20 = 72,631.20 : x
  2. Step 2: Convert to fraction form
    81,184.80/121,777.20 = 72,631.20/x
  3. Step 3: Cross multiply
    81,184.80x = 121,777.20 × 72,631.20
  4. Step 4: Simplify right side
    81,184.80x = 8,844,824,168.64
  5. Step 5: Solve for x
    x = 8,844,824,168.64/81,184.80
  6. Step 6: Final answer
    x = 108,946.80

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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.