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Finding the Fourth Proportional to 70,812.19, 97,720.81 and 38,980.86

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Solution

The fourth proportional to 70,812.19, 97,720.81 and 38,980.86 is: 53,793.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,812.19 : 97,720.81 = 38,980.86 : x
  2. Step 2: Convert to fraction form
    70,812.19/97,720.81 = 38,980.86/x
  3. Step 3: Cross multiply
    70,812.19x = 97,720.81 × 38,980.86
  4. Step 4: Simplify right side
    70,812.19x = 3,809,241,213.70
  5. Step 5: Solve for x
    x = 3,809,241,213.70/70,812.19
  6. Step 6: Final answer
    x = 53,793.58

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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.