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Finding the Fourth Proportional to 111,478.55, 153,968.16 and 73,408.29

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Solution

The fourth proportional to 111,478.55, 153,968.16 and 73,408.29 is: 101,387.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,478.55 : 153,968.16 = 73,408.29 : x
  2. Step 2: Convert to fraction form
    111,478.55/153,968.16 = 73,408.29/x
  3. Step 3: Cross multiply
    111,478.55x = 153,968.16 × 73,408.29
  4. Step 4: Simplify right side
    111,478.55x = 11,302,539,340.05
  5. Step 5: Solve for x
    x = 11,302,539,340.05/111,478.55
  6. Step 6: Final answer
    x = 101,387.57

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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.