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Finding the Fourth Proportional to 70,239.88, 96,931.55 and 39,613.38

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Solution

The fourth proportional to 70,239.88, 96,931.55 and 39,613.38 is: 54,666.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,239.88 : 96,931.55 = 39,613.38 : x
  2. Step 2: Convert to fraction form
    70,239.88/96,931.55 = 39,613.38/x
  3. Step 3: Cross multiply
    70,239.88x = 96,931.55 × 39,613.38
  4. Step 4: Simplify right side
    70,239.88x = 3,839,786,059.68
  5. Step 5: Solve for x
    x = 3,839,786,059.68/70,239.88
  6. Step 6: Final answer
    x = 54,666.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.