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Finding the Fourth Proportional to 70,709.54, 97,579.53 and 38,880.50

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Solution

The fourth proportional to 70,709.54, 97,579.53 and 38,880.50 is: 53,655.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,709.54 : 97,579.53 = 38,880.50 : x
  2. Step 2: Convert to fraction form
    70,709.54/97,579.53 = 38,880.50/x
  3. Step 3: Cross multiply
    70,709.54x = 97,579.53 × 38,880.50
  4. Step 4: Simplify right side
    70,709.54x = 3,793,940,428.27
  5. Step 5: Solve for x
    x = 3,793,940,428.27/70,709.54
  6. Step 6: Final answer
    x = 53,655.29

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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.