Home / 85,828.80-128,743.20-57,835.20

Finding the Fourth Proportional to 85,828.80, 128,743.20 and 57,835.20

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Solution

The fourth proportional to 85,828.80, 128,743.20 and 57,835.20 is: 86,752.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,828.80 : 128,743.20 = 57,835.20 : x
  2. Step 2: Convert to fraction form
    85,828.80/128,743.20 = 57,835.20/x
  3. Step 3: Cross multiply
    85,828.80x = 128,743.20 × 57,835.20
  4. Step 4: Simplify right side
    85,828.80x = 7,445,888,720.64
  5. Step 5: Solve for x
    x = 7,445,888,720.64/85,828.80
  6. Step 6: Final answer
    x = 86,752.80

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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.