Home / 85,135.77-117,445.28-51,127.92

Finding the Fourth Proportional to 85,135.77, 117,445.28 and 51,127.92

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Solution

The fourth proportional to 85,135.77, 117,445.28 and 51,127.92 is: 70,531.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,135.77 : 117,445.28 = 51,127.92 : x
  2. Step 2: Convert to fraction form
    85,135.77/117,445.28 = 51,127.92/x
  3. Step 3: Cross multiply
    85,135.77x = 117,445.28 × 51,127.92
  4. Step 4: Simplify right side
    85,135.77x = 6,004,732,624.58
  5. Step 5: Solve for x
    x = 6,004,732,624.58/85,135.77
  6. Step 6: Final answer
    x = 70,531.25

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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.