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Finding the Fourth Proportional to 157,638.80, 236,400.60 and 52,461.20

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Solution

The fourth proportional to 157,638.80, 236,400.60 and 52,461.20 is: 78,672.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,638.80 : 236,400.60 = 52,461.20 : x
  2. Step 2: Convert to fraction form
    157,638.80/236,400.60 = 52,461.20/x
  3. Step 3: Cross multiply
    157,638.80x = 236,400.60 × 52,461.20
  4. Step 4: Simplify right side
    157,638.80x = 12,401,859,156.72
  5. Step 5: Solve for x
    x = 12,401,859,156.72/157,638.80
  6. Step 6: Final answer
    x = 78,672.63

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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.