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Finding the Fourth Proportional to 70,784.38, 97,685.04 and 38,955.70

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Solution

The fourth proportional to 70,784.38, 97,685.04 and 38,955.70 is: 53,760.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,784.38 : 97,685.04 = 38,955.70 : x
  2. Step 2: Convert to fraction form
    70,784.38/97,685.04 = 38,955.70/x
  3. Step 3: Cross multiply
    70,784.38x = 97,685.04 × 38,955.70
  4. Step 4: Simplify right side
    70,784.38x = 3,805,389,112.73
  5. Step 5: Solve for x
    x = 3,805,389,112.73/70,784.38
  6. Step 6: Final answer
    x = 53,760.29

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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.