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Finding the Fourth Proportional to 119,172.90, 164,459.98 and 65,459.18

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Solution

The fourth proportional to 119,172.90, 164,459.98 and 65,459.18 is: 90,334.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,172.90 : 164,459.98 = 65,459.18 : x
  2. Step 2: Convert to fraction form
    119,172.90/164,459.98 = 65,459.18/x
  3. Step 3: Cross multiply
    119,172.90x = 164,459.98 × 65,459.18
  4. Step 4: Simplify right side
    119,172.90x = 10,765,415,433.62
  5. Step 5: Solve for x
    x = 10,765,415,433.62/119,172.90
  6. Step 6: Final answer
    x = 90,334.43

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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.