Home / 85,710.45-118,279.13-47,986.05

Finding the Fourth Proportional to 85,710.45, 118,279.13 and 47,986.05

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Solution

The fourth proportional to 85,710.45, 118,279.13 and 47,986.05 is: 66,220.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,710.45 : 118,279.13 = 47,986.05 : x
  2. Step 2: Convert to fraction form
    85,710.45/118,279.13 = 47,986.05/x
  3. Step 3: Cross multiply
    85,710.45x = 118,279.13 × 47,986.05
  4. Step 4: Simplify right side
    85,710.45x = 5,675,748,006.21
  5. Step 5: Solve for x
    x = 5,675,748,006.21/85,710.45
  6. Step 6: Final answer
    x = 66,220.02

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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.