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Finding the Fourth Proportional to 173,638.20, 260,457.30 and 155,615.80

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Solution

The fourth proportional to 173,638.20, 260,457.30 and 155,615.80 is: 233,423.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,638.20 : 260,457.30 = 155,615.80 : x
  2. Step 2: Convert to fraction form
    173,638.20/260,457.30 = 155,615.80/x
  3. Step 3: Cross multiply
    173,638.20x = 260,457.30 × 155,615.80
  4. Step 4: Simplify right side
    173,638.20x = 40,531,271,105.34
  5. Step 5: Solve for x
    x = 40,531,271,105.34/173,638.20
  6. Step 6: Final answer
    x = 233,423.70

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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.