Home / 85,520.80-128,281.20-56,029.60

Finding the Fourth Proportional to 85,520.80, 128,281.20 and 56,029.60

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Solution

The fourth proportional to 85,520.80, 128,281.20 and 56,029.60 is: 84,044.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,520.80 : 128,281.20 = 56,029.60 : x
  2. Step 2: Convert to fraction form
    85,520.80/128,281.20 = 56,029.60/x
  3. Step 3: Cross multiply
    85,520.80x = 128,281.20 × 56,029.60
  4. Step 4: Simplify right side
    85,520.80x = 7,187,544,323.52
  5. Step 5: Solve for x
    x = 7,187,544,323.52/85,520.80
  6. Step 6: Final answer
    x = 84,044.40

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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.