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Finding the Fourth Proportional to 70,646.29, 97,489.92 and 38,815.18

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Solution

The fourth proportional to 70,646.29, 97,489.92 and 38,815.18 is: 53,563.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,646.29 : 97,489.92 = 38,815.18 : x
  2. Step 2: Convert to fraction form
    70,646.29/97,489.92 = 38,815.18/x
  3. Step 3: Cross multiply
    70,646.29x = 97,489.92 × 38,815.18
  4. Step 4: Simplify right side
    70,646.29x = 3,784,088,792.99
  5. Step 5: Solve for x
    x = 3,784,088,792.99/70,646.29
  6. Step 6: Final answer
    x = 53,563.87

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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.