Home / 85,159.40-117,520-49,370.16

Finding the Fourth Proportional to 85,159.40, 117,520 and 49,370.16

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Solution

The fourth proportional to 85,159.40, 117,520 and 49,370.16 is: 68,130.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,159.40 : 117,520 = 49,370.16 : x
  2. Step 2: Convert to fraction form
    85,159.40/117,520 = 49,370.16/x
  3. Step 3: Cross multiply
    85,159.40x = 117,520 × 49,370.16
  4. Step 4: Simplify right side
    85,159.40x = 5,801,980,615.60
  5. Step 5: Solve for x
    x = 5,801,980,615.60/85,159.40
  6. Step 6: Final answer
    x = 68,130.83

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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.