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Finding the Fourth Proportional to 218,779.80, 328,169.70 and 144,000.60

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Solution

The fourth proportional to 218,779.80, 328,169.70 and 144,000.60 is: 216,000.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,779.80 : 328,169.70 = 144,000.60 : x
  2. Step 2: Convert to fraction form
    218,779.80/328,169.70 = 144,000.60/x
  3. Step 3: Cross multiply
    218,779.80x = 328,169.70 × 144,000.60
  4. Step 4: Simplify right side
    218,779.80x = 47,256,633,701.82
  5. Step 5: Solve for x
    x = 47,256,633,701.82/218,779.80
  6. Step 6: Final answer
    x = 216,000.90

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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.