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Finding the Fourth Proportional to 173,639.40, 260,459.10 and 55,309.80

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Solution

The fourth proportional to 173,639.40, 260,459.10 and 55,309.80 is: 82,964.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,639.40 : 260,459.10 = 55,309.80 : x
  2. Step 2: Convert to fraction form
    173,639.40/260,459.10 = 55,309.80/x
  3. Step 3: Cross multiply
    173,639.40x = 260,459.10 × 55,309.80
  4. Step 4: Simplify right side
    173,639.40x = 14,405,940,729.18
  5. Step 5: Solve for x
    x = 14,405,940,729.18/173,639.40
  6. Step 6: Final answer
    x = 82,964.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.