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Finding the Fourth Proportional to 85,881.60, 118,507.04 and 47,640.16

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Solution

The fourth proportional to 85,881.60, 118,507.04 and 47,640.16 is: 65,738.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,881.60 : 118,507.04 = 47,640.16 : x
  2. Step 2: Convert to fraction form
    85,881.60/118,507.04 = 47,640.16/x
  3. Step 3: Cross multiply
    85,881.60x = 118,507.04 × 47,640.16
  4. Step 4: Simplify right side
    85,881.60x = 5,645,694,346.73
  5. Step 5: Solve for x
    x = 5,645,694,346.73/85,881.60
  6. Step 6: Final answer
    x = 65,738.11

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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.