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Finding the Fourth Proportional to 71,390.30, 107,085.45 and 36,398.30

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Solution

The fourth proportional to 71,390.30, 107,085.45 and 36,398.30 is: 54,597.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,390.30 : 107,085.45 = 36,398.30 : x
  2. Step 2: Convert to fraction form
    71,390.30/107,085.45 = 36,398.30/x
  3. Step 3: Cross multiply
    71,390.30x = 107,085.45 × 36,398.30
  4. Step 4: Simplify right side
    71,390.30x = 3,897,728,334.74
  5. Step 5: Solve for x
    x = 3,897,728,334.74/71,390.30
  6. Step 6: Final answer
    x = 54,597.45

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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.