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Finding the Fourth Proportional to 70,760.48, 97,645.93 and 38,928.56

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Solution

The fourth proportional to 70,760.48, 97,645.93 and 38,928.56 is: 53,719.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,760.48 : 97,645.93 = 38,928.56 : x
  2. Step 2: Convert to fraction form
    70,760.48/97,645.93 = 38,928.56/x
  3. Step 3: Cross multiply
    70,760.48x = 97,645.93 × 38,928.56
  4. Step 4: Simplify right side
    70,760.48x = 3,801,215,444.76
  5. Step 5: Solve for x
    x = 3,801,215,444.76/70,760.48
  6. Step 6: Final answer
    x = 53,719.47

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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.