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Finding the Fourth Proportional to 70,636.78, 97,478.80 and 38,807.73

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Solution

The fourth proportional to 70,636.78, 97,478.80 and 38,807.73 is: 53,554.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,636.78 : 97,478.80 = 38,807.73 : x
  2. Step 2: Convert to fraction form
    70,636.78/97,478.80 = 38,807.73/x
  3. Step 3: Cross multiply
    70,636.78x = 97,478.80 × 38,807.73
  4. Step 4: Simplify right side
    70,636.78x = 3,782,930,854.10
  5. Step 5: Solve for x
    x = 3,782,930,854.10/70,636.78
  6. Step 6: Final answer
    x = 53,554.69

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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.