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Finding the Fourth Proportional to 123,354.43, 170,230.55 and 72,368.03

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Solution

The fourth proportional to 123,354.43, 170,230.55 and 72,368.03 is: 99,868.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,354.43 : 170,230.55 = 72,368.03 : x
  2. Step 2: Convert to fraction form
    123,354.43/170,230.55 = 72,368.03/x
  3. Step 3: Cross multiply
    123,354.43x = 170,230.55 × 72,368.03
  4. Step 4: Simplify right side
    123,354.43x = 12,319,249,613.05
  5. Step 5: Solve for x
    x = 12,319,249,613.05/123,354.43
  6. Step 6: Final answer
    x = 99,868.73

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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.