Home / 87,045.64-120,190.80-66,870.56

Finding the Fourth Proportional to 87,045.64, 120,190.80 and 66,870.56

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Solution

The fourth proportional to 87,045.64, 120,190.80 and 66,870.56 is: 92,333.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,045.64 : 120,190.80 = 66,870.56 : x
  2. Step 2: Convert to fraction form
    87,045.64/120,190.80 = 66,870.56/x
  3. Step 3: Cross multiply
    87,045.64x = 120,190.80 × 66,870.56
  4. Step 4: Simplify right side
    87,045.64x = 8,037,226,102.85
  5. Step 5: Solve for x
    x = 8,037,226,102.85/87,045.64
  6. Step 6: Final answer
    x = 92,333.47

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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.