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Finding the Fourth Proportional to 154,530.48, 213,237.72 and 87,462.48

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Solution

The fourth proportional to 154,530.48, 213,237.72 and 87,462.48 is: 120,690.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,530.48 : 213,237.72 = 87,462.48 : x
  2. Step 2: Convert to fraction form
    154,530.48/213,237.72 = 87,462.48/x
  3. Step 3: Cross multiply
    154,530.48x = 213,237.72 × 87,462.48
  4. Step 4: Simplify right side
    154,530.48x = 18,650,299,820.75
  5. Step 5: Solve for x
    x = 18,650,299,820.75/154,530.48
  6. Step 6: Final answer
    x = 120,690.10

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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.