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Finding the Fourth Proportional to 230,641.20, 345,929.40 and 72,885.60

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Solution

The fourth proportional to 230,641.20, 345,929.40 and 72,885.60 is: 109,318.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,641.20 : 345,929.40 = 72,885.60 : x
  2. Step 2: Convert to fraction form
    230,641.20/345,929.40 = 72,885.60/x
  3. Step 3: Cross multiply
    230,641.20x = 345,929.40 × 72,885.60
  4. Step 4: Simplify right side
    230,641.20x = 25,213,271,876.64
  5. Step 5: Solve for x
    x = 25,213,271,876.64/230,641.20
  6. Step 6: Final answer
    x = 109,318.16

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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.