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Finding the Fourth Proportional to 71,643.55, 107,465.21 and 19,053.04

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Solution

The fourth proportional to 71,643.55, 107,465.21 and 19,053.04 is: 28,579.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,643.55 : 107,465.21 = 19,053.04 : x
  2. Step 2: Convert to fraction form
    71,643.55/107,465.21 = 19,053.04/x
  3. Step 3: Cross multiply
    71,643.55x = 107,465.21 × 19,053.04
  4. Step 4: Simplify right side
    71,643.55x = 2,047,538,944.74
  5. Step 5: Solve for x
    x = 2,047,538,944.74/71,643.55
  6. Step 6: Final answer
    x = 28,579.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.