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Finding the Fourth Proportional to 70,729.88, 97,605 and 38,898.68

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Solution

The fourth proportional to 70,729.88, 97,605 and 38,898.68 is: 53,678.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,729.88 : 97,605 = 38,898.68 : x
  2. Step 2: Convert to fraction form
    70,729.88/97,605 = 38,898.68/x
  3. Step 3: Cross multiply
    70,729.88x = 97,605 × 38,898.68
  4. Step 4: Simplify right side
    70,729.88x = 3,796,705,661.40
  5. Step 5: Solve for x
    x = 3,796,705,661.40/70,729.88
  6. Step 6: Final answer
    x = 53,678.95

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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.