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Finding the Fourth Proportional to 219,991.40, 329,987.10 and 53,779.40

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Solution

The fourth proportional to 219,991.40, 329,987.10 and 53,779.40 is: 80,669.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,991.40 : 329,987.10 = 53,779.40 : x
  2. Step 2: Convert to fraction form
    219,991.40/329,987.10 = 53,779.40/x
  3. Step 3: Cross multiply
    219,991.40x = 329,987.10 × 53,779.40
  4. Step 4: Simplify right side
    219,991.40x = 17,746,508,245.74
  5. Step 5: Solve for x
    x = 17,746,508,245.74/219,991.40
  6. Step 6: Final answer
    x = 80,669.10

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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.