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Finding the Fourth Proportional to 154,328.40, 212,972.04 and 87,262.80

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Solution

The fourth proportional to 154,328.40, 212,972.04 and 87,262.80 is: 120,422.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,328.40 : 212,972.04 = 87,262.80 : x
  2. Step 2: Convert to fraction form
    154,328.40/212,972.04 = 87,262.80/x
  3. Step 3: Cross multiply
    154,328.40x = 212,972.04 × 87,262.80
  4. Step 4: Simplify right side
    154,328.40x = 18,584,536,532.11
  5. Step 5: Solve for x
    x = 18,584,536,532.11/154,328.40
  6. Step 6: Final answer
    x = 120,422.01

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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.