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Finding the Fourth Proportional to 70,817.66, 97,729.02 and 38,987.09

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Solution

The fourth proportional to 70,817.66, 97,729.02 and 38,987.09 is: 53,802.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,817.66 : 97,729.02 = 38,987.09 : x
  2. Step 2: Convert to fraction form
    70,817.66/97,729.02 = 38,987.09/x
  3. Step 3: Cross multiply
    70,817.66x = 97,729.02 × 38,987.09
  4. Step 4: Simplify right side
    70,817.66x = 3,810,169,609.71
  5. Step 5: Solve for x
    x = 3,810,169,609.71/70,817.66
  6. Step 6: Final answer
    x = 53,802.54

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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.