Home / 81,472.96-121,652.09-72,984.67

Finding the Fourth Proportional to 81,472.96, 121,652.09 and 72,984.67

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Solution

The fourth proportional to 81,472.96, 121,652.09 and 72,984.67 is: 108,977.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,472.96 : 121,652.09 = 72,984.67 : x
  2. Step 2: Convert to fraction form
    81,472.96/121,652.09 = 72,984.67/x
  3. Step 3: Cross multiply
    81,472.96x = 121,652.09 × 72,984.67
  4. Step 4: Simplify right side
    81,472.96x = 8,878,737,643.46
  5. Step 5: Solve for x
    x = 8,878,737,643.46/81,472.96
  6. Step 6: Final answer
    x = 108,977.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.