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Finding the Fourth Proportional to 260,616.39, 390,916.49 and 83,134.05

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Solution

The fourth proportional to 260,616.39, 390,916.49 and 83,134.05 is: 124,698.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,616.39 : 390,916.49 = 83,134.05 : x
  2. Step 2: Convert to fraction form
    260,616.39/390,916.49 = 83,134.05/x
  3. Step 3: Cross multiply
    260,616.39x = 390,916.49 × 83,134.05
  4. Step 4: Simplify right side
    260,616.39x = 32,498,470,609.81
  5. Step 5: Solve for x
    x = 32,498,470,609.81/260,616.39
  6. Step 6: Final answer
    x = 124,698.49

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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.