Home / 90,645.08-125,084.40-56,651.72

Finding the Fourth Proportional to 90,645.08, 125,084.40 and 56,651.72

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Solution

The fourth proportional to 90,645.08, 125,084.40 and 56,651.72 is: 78,175.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,645.08 : 125,084.40 = 56,651.72 : x
  2. Step 2: Convert to fraction form
    90,645.08/125,084.40 = 56,651.72/x
  3. Step 3: Cross multiply
    90,645.08x = 125,084.40 × 56,651.72
  4. Step 4: Simplify right side
    90,645.08x = 7,086,246,405.17
  5. Step 5: Solve for x
    x = 7,086,246,405.17/90,645.08
  6. Step 6: Final answer
    x = 78,175.74

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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.