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Finding the Fourth Proportional to 220,623.40, 330,870.30 and 87,459.40

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Solution

The fourth proportional to 220,623.40, 330,870.30 and 87,459.40 is: 131,163.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,623.40 : 330,870.30 = 87,459.40 : x
  2. Step 2: Convert to fraction form
    220,623.40/330,870.30 = 87,459.40/x
  3. Step 3: Cross multiply
    220,623.40x = 330,870.30 × 87,459.40
  4. Step 4: Simplify right side
    220,623.40x = 28,937,717,915.82
  5. Step 5: Solve for x
    x = 28,937,717,915.82/220,623.40
  6. Step 6: Final answer
    x = 131,163.41

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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.