Home / 85,385.41-128,050.77-40,400.65

Finding the Fourth Proportional to 85,385.41, 128,050.77 and 40,400.65

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Solution

The fourth proportional to 85,385.41, 128,050.77 and 40,400.65 is: 60,588.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,385.41 : 128,050.77 = 40,400.65 : x
  2. Step 2: Convert to fraction form
    85,385.41/128,050.77 = 40,400.65/x
  3. Step 3: Cross multiply
    85,385.41x = 128,050.77 × 40,400.65
  4. Step 4: Simplify right side
    85,385.41x = 5,173,334,341.00
  5. Step 5: Solve for x
    x = 5,173,334,341.00/85,385.41
  6. Step 6: Final answer
    x = 60,588.04

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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.