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Finding the Fourth Proportional to 218,779.40, 328,215.54 and 69,062.96

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Solution

The fourth proportional to 218,779.40, 328,215.54 and 69,062.96 is: 103,609.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,779.40 : 328,215.54 = 69,062.96 : x
  2. Step 2: Convert to fraction form
    218,779.40/328,215.54 = 69,062.96/x
  3. Step 3: Cross multiply
    218,779.40x = 328,215.54 × 69,062.96
  4. Step 4: Simplify right side
    218,779.40x = 22,667,536,710.40
  5. Step 5: Solve for x
    x = 22,667,536,710.40/218,779.40
  6. Step 6: Final answer
    x = 103,609.10

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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.