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Finding the Fourth Proportional to 260,113.20, 390,169.80 and 73,124.70

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Solution

The fourth proportional to 260,113.20, 390,169.80 and 73,124.70 is: 109,687.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,113.20 : 390,169.80 = 73,124.70 : x
  2. Step 2: Convert to fraction form
    260,113.20/390,169.80 = 73,124.70/x
  3. Step 3: Cross multiply
    260,113.20x = 390,169.80 × 73,124.70
  4. Step 4: Simplify right side
    260,113.20x = 28,531,049,574.06
  5. Step 5: Solve for x
    x = 28,531,049,574.06/260,113.20
  6. Step 6: Final answer
    x = 109,687.05

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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.