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Finding the Fourth Proportional to 320,139.96, 480,209.88 and 109,779.72

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Solution

The fourth proportional to 320,139.96, 480,209.88 and 109,779.72 is: 164,669.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,139.96 : 480,209.88 = 109,779.72 : x
  2. Step 2: Convert to fraction form
    320,139.96/480,209.88 = 109,779.72/x
  3. Step 3: Cross multiply
    320,139.96x = 480,209.88 × 109,779.72
  4. Step 4: Simplify right side
    320,139.96x = 52,717,306,167.63
  5. Step 5: Solve for x
    x = 52,717,306,167.63/320,139.96
  6. Step 6: Final answer
    x = 164,669.56

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1.5x scale

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.