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Finding the Fourth Proportional to 70,839.38, 97,758.34 and 39,008.20

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Solution

The fourth proportional to 70,839.38, 97,758.34 and 39,008.20 is: 53,831.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,839.38 : 97,758.34 = 39,008.20 : x
  2. Step 2: Convert to fraction form
    70,839.38/97,758.34 = 39,008.20/x
  3. Step 3: Cross multiply
    70,839.38x = 97,758.34 × 39,008.20
  4. Step 4: Simplify right side
    70,839.38x = 3,813,376,536.47
  5. Step 5: Solve for x
    x = 3,813,376,536.47/70,839.38
  6. Step 6: Final answer
    x = 53,831.31

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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.