Home / 90,828.12-125,345.72-56,825.68

Finding the Fourth Proportional to 90,828.12, 125,345.72 and 56,825.68

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Solution

The fourth proportional to 90,828.12, 125,345.72 and 56,825.68 is: 78,421.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,828.12 : 125,345.72 = 56,825.68 : x
  2. Step 2: Convert to fraction form
    90,828.12/125,345.72 = 56,825.68/x
  3. Step 3: Cross multiply
    90,828.12x = 125,345.72 × 56,825.68
  4. Step 4: Simplify right side
    90,828.12x = 7,122,855,774.09
  5. Step 5: Solve for x
    x = 7,122,855,774.09/90,828.12
  6. Step 6: Final answer
    x = 78,421.26

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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.