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Finding the Fourth Proportional to 70,639.43, 97,477.97 and 64,996.97

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Solution

The fourth proportional to 70,639.43, 97,477.97 and 64,996.97 is: 89,691.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,639.43 : 97,477.97 = 64,996.97 : x
  2. Step 2: Convert to fraction form
    70,639.43/97,477.97 = 64,996.97/x
  3. Step 3: Cross multiply
    70,639.43x = 97,477.97 × 64,996.97
  4. Step 4: Simplify right side
    70,639.43x = 6,335,771,879.38
  5. Step 5: Solve for x
    x = 6,335,771,879.38/70,639.43
  6. Step 6: Final answer
    x = 89,691.72

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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.