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Finding the Fourth Proportional to 70,609.13, 97,442.28 and 38,778.71

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Solution

The fourth proportional to 70,609.13, 97,442.28 and 38,778.71 is: 53,515.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,609.13 : 97,442.28 = 38,778.71 : x
  2. Step 2: Convert to fraction form
    70,609.13/97,442.28 = 38,778.71/x
  3. Step 3: Cross multiply
    70,609.13x = 97,442.28 × 38,778.71
  4. Step 4: Simplify right side
    70,609.13x = 3,778,685,917.86
  5. Step 5: Solve for x
    x = 3,778,685,917.86/70,609.13
  6. Step 6: Final answer
    x = 53,515.54

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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.