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Finding the Fourth Proportional to 70,911.32, 97,855.65 and 38,645.24

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Solution

The fourth proportional to 70,911.32, 97,855.65 and 38,645.24 is: 53,329.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,911.32 : 97,855.65 = 38,645.24 : x
  2. Step 2: Convert to fraction form
    70,911.32/97,855.65 = 38,645.24/x
  3. Step 3: Cross multiply
    70,911.32x = 97,855.65 × 38,645.24
  4. Step 4: Simplify right side
    70,911.32x = 3,781,654,590.33
  5. Step 5: Solve for x
    x = 3,781,654,590.33/70,911.32
  6. Step 6: Final answer
    x = 53,329.35

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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.