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Finding the Fourth Proportional to 70,842.39, 97,765.52 and 40,636.23

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Solution

The fourth proportional to 70,842.39, 97,765.52 and 40,636.23 is: 56,079.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,842.39 : 97,765.52 = 40,636.23 : x
  2. Step 2: Convert to fraction form
    70,842.39/97,765.52 = 40,636.23/x
  3. Step 3: Cross multiply
    70,842.39x = 97,765.52 × 40,636.23
  4. Step 4: Simplify right side
    70,842.39x = 3,972,821,953.61
  5. Step 5: Solve for x
    x = 3,972,821,953.61/70,842.39
  6. Step 6: Final answer
    x = 56,079.73

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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.