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Finding the Fourth Proportional to 260,074.96, 390,225.13 and 91,715.58

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Solution

The fourth proportional to 260,074.96, 390,225.13 and 91,715.58 is: 137,613.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,074.96 : 390,225.13 = 91,715.58 : x
  2. Step 2: Convert to fraction form
    260,074.96/390,225.13 = 91,715.58/x
  3. Step 3: Cross multiply
    260,074.96x = 390,225.13 × 91,715.58
  4. Step 4: Simplify right side
    260,074.96x = 35,789,723,899.24
  5. Step 5: Solve for x
    x = 35,789,723,899.24/260,074.96
  6. Step 6: Final answer
    x = 137,613.11

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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.