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Finding the Fourth Proportional to 85,611.60, 118,127.16 and 47,878.56

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Solution

The fourth proportional to 85,611.60, 118,127.16 and 47,878.56 is: 66,062.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,611.60 : 118,127.16 = 47,878.56 : x
  2. Step 2: Convert to fraction form
    85,611.60/118,127.16 = 47,878.56/x
  3. Step 3: Cross multiply
    85,611.60x = 118,127.16 × 47,878.56
  4. Step 4: Simplify right side
    85,611.60x = 5,655,758,317.69
  5. Step 5: Solve for x
    x = 5,655,758,317.69/85,611.60
  6. Step 6: Final answer
    x = 66,062.99

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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.