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Finding the Fourth Proportional to 70,748.96, 97,636.12 and 38,920.28

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Solution

The fourth proportional to 70,748.96, 97,636.12 and 38,920.28 is: 53,711.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,748.96 : 97,636.12 = 38,920.28 : x
  2. Step 2: Convert to fraction form
    70,748.96/97,636.12 = 38,920.28/x
  3. Step 3: Cross multiply
    70,748.96x = 97,636.12 × 38,920.28
  4. Step 4: Simplify right side
    70,748.96x = 3,800,025,128.51
  5. Step 5: Solve for x
    x = 3,800,025,128.51/70,748.96
  6. Step 6: Final answer
    x = 53,711.39

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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.