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Finding the Fourth Proportional to 248,421.76, 372,638.76 and 90,650.16

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Solution

The fourth proportional to 248,421.76, 372,638.76 and 90,650.16 is: 135,977.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,421.76 : 372,638.76 = 90,650.16 : x
  2. Step 2: Convert to fraction form
    248,421.76/372,638.76 = 90,650.16/x
  3. Step 3: Cross multiply
    248,421.76x = 372,638.76 × 90,650.16
  4. Step 4: Simplify right side
    248,421.76x = 33,779,763,216.20
  5. Step 5: Solve for x
    x = 33,779,763,216.20/248,421.76
  6. Step 6: Final answer
    x = 135,977.47

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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.