Home / 90,643.08-125,081.64-56,649.72

Finding the Fourth Proportional to 90,643.08, 125,081.64 and 56,649.72

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Solution

The fourth proportional to 90,643.08, 125,081.64 and 56,649.72 is: 78,172.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,643.08 : 125,081.64 = 56,649.72 : x
  2. Step 2: Convert to fraction form
    90,643.08/125,081.64 = 56,649.72/x
  3. Step 3: Cross multiply
    90,643.08x = 125,081.64 × 56,649.72
  4. Step 4: Simplify right side
    90,643.08x = 7,085,839,883.14
  5. Step 5: Solve for x
    x = 7,085,839,883.14/90,643.08
  6. Step 6: Final answer
    x = 78,172.98

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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.