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Finding the Fourth Proportional to 70,459, 97,236.36 and 38,629.12

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Solution

The fourth proportional to 70,459, 97,236.36 and 38,629.12 is: 53,309.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,459 : 97,236.36 = 38,629.12 : x
  2. Step 2: Convert to fraction form
    70,459/97,236.36 = 38,629.12/x
  3. Step 3: Cross multiply
    70,459x = 97,236.36 × 38,629.12
  4. Step 4: Simplify right side
    70,459x = 3,756,155,018.80
  5. Step 5: Solve for x
    x = 3,756,155,018.80/70,459
  6. Step 6: Final answer
    x = 53,309.80

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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.