Home / 90,823.60-125,339.48-56,821.20

Finding the Fourth Proportional to 90,823.60, 125,339.48 and 56,821.20

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Solution

The fourth proportional to 90,823.60, 125,339.48 and 56,821.20 is: 78,415.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,823.60 : 125,339.48 = 56,821.20 : x
  2. Step 2: Convert to fraction form
    90,823.60/125,339.48 = 56,821.20/x
  3. Step 3: Cross multiply
    90,823.60x = 125,339.48 × 56,821.20
  4. Step 4: Simplify right side
    90,823.60x = 7,121,939,660.98
  5. Step 5: Solve for x
    x = 7,121,939,660.98/90,823.60
  6. Step 6: Final answer
    x = 78,415.08

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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.