Home / 85,865.49-128,631.45-48,311.05

Finding the Fourth Proportional to 85,865.49, 128,631.45 and 48,311.05

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Solution

The fourth proportional to 85,865.49, 128,631.45 and 48,311.05 is: 72,372.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,865.49 : 128,631.45 = 48,311.05 : x
  2. Step 2: Convert to fraction form
    85,865.49/128,631.45 = 48,311.05/x
  3. Step 3: Cross multiply
    85,865.49x = 128,631.45 × 48,311.05
  4. Step 4: Simplify right side
    85,865.49x = 6,214,320,412.52
  5. Step 5: Solve for x
    x = 6,214,320,412.52/85,865.49
  6. Step 6: Final answer
    x = 72,372.74

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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.