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Finding the Fourth Proportional to 70,809.03, 97,716.51 and 38,978.46

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Solution

The fourth proportional to 70,809.03, 97,716.51 and 38,978.46 is: 53,790.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,809.03 : 97,716.51 = 38,978.46 : x
  2. Step 2: Convert to fraction form
    70,809.03/97,716.51 = 38,978.46/x
  3. Step 3: Cross multiply
    70,809.03x = 97,716.51 × 38,978.46
  4. Step 4: Simplify right side
    70,809.03x = 3,808,839,076.37
  5. Step 5: Solve for x
    x = 3,808,839,076.37/70,809.03
  6. Step 6: Final answer
    x = 53,790.30

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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.