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Finding the Fourth Proportional to 123,455.80, 170,372.16 and 75,041.08

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Solution

The fourth proportional to 123,455.80, 170,372.16 and 75,041.08 is: 103,558.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,455.80 : 170,372.16 = 75,041.08 : x
  2. Step 2: Convert to fraction form
    123,455.80/170,372.16 = 75,041.08/x
  3. Step 3: Cross multiply
    123,455.80x = 170,372.16 × 75,041.08
  4. Step 4: Simplify right side
    123,455.80x = 12,784,911,420.75
  5. Step 5: Solve for x
    x = 12,784,911,420.75/123,455.80
  6. Step 6: Final answer
    x = 103,558.62

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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.