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Finding the Fourth Proportional to 70,278.60, 96,985.17 and 38,448.84

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Solution

The fourth proportional to 70,278.60, 96,985.17 and 38,448.84 is: 53,059.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,278.60 : 96,985.17 = 38,448.84 : x
  2. Step 2: Convert to fraction form
    70,278.60/96,985.17 = 38,448.84/x
  3. Step 3: Cross multiply
    70,278.60x = 96,985.17 × 38,448.84
  4. Step 4: Simplify right side
    70,278.60x = 3,728,967,283.70
  5. Step 5: Solve for x
    x = 3,728,967,283.70/70,278.60
  6. Step 6: Final answer
    x = 53,059.78

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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.