Home / 280,421.20-420,631.80-93,432.70

Finding the Fourth Proportional to 280,421.20, 420,631.80 and 93,432.70

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Solution

The fourth proportional to 280,421.20, 420,631.80 and 93,432.70 is: 140,149.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,421.20 : 420,631.80 = 93,432.70 : x
  2. Step 2: Convert to fraction form
    280,421.20/420,631.80 = 93,432.70/x
  3. Step 3: Cross multiply
    280,421.20x = 420,631.80 × 93,432.70
  4. Step 4: Simplify right side
    280,421.20x = 39,300,764,779.86
  5. Step 5: Solve for x
    x = 39,300,764,779.86/280,421.20
  6. Step 6: Final answer
    x = 140,149.05

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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.