Home / 85,005.07-127,424.43-31,657.91

Finding the Fourth Proportional to 85,005.07, 127,424.43 and 31,657.91

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Solution

The fourth proportional to 85,005.07, 127,424.43 and 31,657.91 is: 47,455.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,005.07 : 127,424.43 = 31,657.91 : x
  2. Step 2: Convert to fraction form
    85,005.07/127,424.43 = 31,657.91/x
  3. Step 3: Cross multiply
    85,005.07x = 127,424.43 × 31,657.91
  4. Step 4: Simplify right side
    85,005.07x = 4,033,990,499.62
  5. Step 5: Solve for x
    x = 4,033,990,499.62/85,005.07
  6. Step 6: Final answer
    x = 47,455.88

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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.