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Finding the Fourth Proportional to 81,419.68, 112,357.20 and 45,611.20

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Solution

The fourth proportional to 81,419.68, 112,357.20 and 45,611.20 is: 62,942.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,419.68 : 112,357.20 = 45,611.20 : x
  2. Step 2: Convert to fraction form
    81,419.68/112,357.20 = 45,611.20/x
  3. Step 3: Cross multiply
    81,419.68x = 112,357.20 × 45,611.20
  4. Step 4: Simplify right side
    81,419.68x = 5,124,746,720.64
  5. Step 5: Solve for x
    x = 5,124,746,720.64/81,419.68
  6. Step 6: Final answer
    x = 62,942.36

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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.