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Finding the Fourth Proportional to 85,908.80, 118,667.70 and 71,615.32

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Solution

The fourth proportional to 85,908.80, 118,667.70 and 71,615.32 is: 98,923.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,908.80 : 118,667.70 = 71,615.32 : x
  2. Step 2: Convert to fraction form
    85,908.80/118,667.70 = 71,615.32/x
  3. Step 3: Cross multiply
    85,908.80x = 118,667.70 × 71,615.32
  4. Step 4: Simplify right side
    85,908.80x = 8,498,425,309.16
  5. Step 5: Solve for x
    x = 8,498,425,309.16/85,908.80
  6. Step 6: Final answer
    x = 98,923.80

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1.5x scale

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.