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Finding the Fourth Proportional to 157,612.70, 236,440.65 and 52,420.70

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Solution

The fourth proportional to 157,612.70, 236,440.65 and 52,420.70 is: 78,638.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,612.70 : 236,440.65 = 52,420.70 : x
  2. Step 2: Convert to fraction form
    157,612.70/236,440.65 = 52,420.70/x
  3. Step 3: Cross multiply
    157,612.70x = 236,440.65 × 52,420.70
  4. Step 4: Simplify right side
    157,612.70x = 12,394,384,381.46
  5. Step 5: Solve for x
    x = 12,394,384,381.46/157,612.70
  6. Step 6: Final answer
    x = 78,638.23

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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.