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Finding the Fourth Proportional to 487,728.10, 731,578.40 and 132,745.20

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Solution

The fourth proportional to 487,728.10, 731,578.40 and 132,745.20 is: 199,114.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,728.10 : 731,578.40 = 132,745.20 : x
  2. Step 2: Convert to fraction form
    487,728.10/731,578.40 = 132,745.20/x
  3. Step 3: Cross multiply
    487,728.10x = 731,578.40 × 132,745.20
  4. Step 4: Simplify right side
    487,728.10x = 97,113,518,114.33
  5. Step 5: Solve for x
    x = 97,113,518,114.33/487,728.10
  6. Step 6: Final answer
    x = 199,114.05

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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.