Home / 280,042,406.40-420,063,609.60-75,570,153.60

Finding the Fourth Proportional to 280,042,406.40, 420,063,609.60 and 75,570,153.60

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Solution

The fourth proportional to 280,042,406.40, 420,063,609.60 and 75,570,153.60 is: 113,355,230.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,042,406.40 : 420,063,609.60 = 75,570,153.60 : x
  2. Step 2: Convert to fraction form
    280,042,406.40/420,063,609.60 = 75,570,153.60/x
  3. Step 3: Cross multiply
    280,042,406.40x = 420,063,609.60 × 75,570,153.60
  4. Step 4: Simplify right side
    280,042,406.40x = 31,744,271,499,242,432
  5. Step 5: Solve for x
    x = 31,744,271,499,242,432/280,042,406.40
  6. Step 6: Final answer
    x = 113,355,230.40

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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.