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Finding the Fourth Proportional to 85,688.53, 118,236.09 and 53,834.88

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Solution

The fourth proportional to 85,688.53, 118,236.09 and 53,834.88 is: 74,283.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,688.53 : 118,236.09 = 53,834.88 : x
  2. Step 2: Convert to fraction form
    85,688.53/118,236.09 = 53,834.88/x
  3. Step 3: Cross multiply
    85,688.53x = 118,236.09 × 53,834.88
  4. Step 4: Simplify right side
    85,688.53x = 6,365,225,716.82
  5. Step 5: Solve for x
    x = 6,365,225,716.82/85,688.53
  6. Step 6: Final answer
    x = 74,283.29

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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.